Showing posts with label info. Show all posts
Showing posts with label info. Show all posts

Sejarah jam

sejarah jam

Jam automatis pertama kali diciptaan Abraham Perrelet 1780.
Jam kantung pertama kali diciptakan oleh Peter Henlein di Jerman tahun 1524.
Begitu banyak kekurangan dari jam kantung pertama ini, baik dari sisi berat dan pengoperasiannya yang rumit membuatnya menjadi tidaklah praktis digunakan sebagai jam kantung.
Mesin yang digunakan masih terbuat dari besi biasa, yang dikemudian hari mengalami kemajuan menggunakan kuningan.
Selain itu pada jam kantung pertama ini belum terdapat balance spring dan sangat tidak akurat. Jam ini hanya memiliki satu jarum yaitu jam dan harus diputar dua kali dalam sehari, tetapi disamping semua kekurangan itu, hal ini merupakan sebuah inovasi dan kemajuan yang sangat pesat pada jamannya.

Dikemudian hari penemuan besar di jaman itu adalah per spiral yang bentuknya melingkar seperti obat nyamuk bakar yang memungkinkan penyimpanan energi yang lebih lama untuk menggerakkan jam, yang juga memungkinkan penurunan secara drastis berat dari jam.

Bentuk jam menjadi populer pada tahun 1600-an dengan ada bentuk-bentuk binatang atau objek lain, tetapi tema keagamaan menjadi hal yang populer.
Walaupun mengalami beberapa kemajuan, tetapi jam masih lebih dianggap sebagai perhiasaan pada masa itu.

Tahun 1704 batu rubi untuk pertama kali digunakan dalam mesin jam dalam upaya untuk meningkatkan ketepatan waktunya.

Tahun 1780 enamel (lapisan cat/porselen) digunakan pada plat permukaan tampilan jam (dial) sehingga membuatnya lebih mudah telihat pada kondisi minim cahaya.

Pada tahun 1780 mesin automatis (energi pada per terisi secara otomatis tanpa harus diputar secara manual)diciptakan oleh Abraham Perrelet (merk Perrelet hingga sekarang masih ada) tapi oleh Thomas Prest dipatenkan di tahun 1820.

Pada tahun 1809 di Amerika, produsen jam pertama adalah Luther Goddard of Shrewsbury di Massachussetts.

Tahun 1848 Louis Brand membuka tempak kerja jam pertamanya di La Chaux de Fonds yang dikemudian hari kita kenal sebagai merk Omega.

Tetapi perusahaan-perusahaan jam di Amerika lah yang melakukan produksi secara massal ditahun 1850 seperti Walthan, Elgin dan Hamilton (semua merk ini hingga sekarang masih ada)

Tahun 1900-an kemajuan pesat dalam ilmu per-logam-an berpengaruh terhadap mutu dari balance spring (per rambut) yang merupakan bagian yang sensitif terhadap perubahan temperatur dan posisi yang sangat berpengaruh terhadap ketepatan jam.

Tahun 1905 awal mula Rolex oleh Hans Wilsdorf.

Tahun 1914 dibuat untuk pertama kali jam tangan dengan alarm

Tahun 1924 Seiko berdiri di Tokyo

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dari http://foolishour.blogspot.com

ROLEX HISTORY

In 1908, Rolex was founded by Mr. Hans Wilsdorf, a German National Citizen. Initially the company was named Wilsdorf & Davis as Wilsdorf founded company together with his brother in law. At the time, mostly pocket watches were produced by Swiss watch manufacturers as manufactures still had difficulty to produce accurate and reliable movements in such small size that they would fit in a wrist watch. Wilsdorf was a perfectionist who improved the standards for watch making as he did strive for smaller and more accurate movements that transformed style and fashion from larger pocket watches to smaller more practical wristwatches. Aegler, a small Swiss company agreed to supply Wilsdorf with movements small enough to be worn on the wrist. Wilsdorf's production included a variety of case designs: casual, formal and sporty.

In 1910, Rolex sent their first movement to the School of Horology in Switzerland. It was awarded the world's first wrist watch chronometer rating. Wilsdorf recognized two major requirements for watches: 1) To keep accurate time, and 2) To be reliable. With the Chronometer Award, 'accuracy' of timekeeping was considered to be under control and Wilsdorf started to work on improving the reliability of his watches. One of the main problems at the time was, that dust and moisture would enter in the watch case and progressively damage in movement. To solve, one would need to develop a completely dust and waterproof watch case. Dust and water would enter watch cases via the casebook and via the crown. Wilsdorf developed a screw crown and casebook mechanism that revolutionized the watch industry.

The first waterproof watch was cleverly advertised around the world. At the time, the public was rather skeptical if the watch would be really waterproof. However, after seeing a watch in an aquarium in the shop window, many people were convinced. Around the world one could see windows of watch shops with an aquarium and submerged Rolex watches. This campaign created an enormous brand awareness for Rolex. Since then, Rolex has continued to be at the forefront of the watch making industry. Today, almost every watch manufacturer followed Rolex and offers waterproof watches.

The Rolex Prince, developed in 1928 became a best seller with its dual dial and rectangular case. In 1931 Rolex invented the "Rotor" - a semicircular plate of metal that with gravity, would move freely to wind the watch. Thus, the Rolex "Perpetual" (automatic) movement was born. Rolex's star has risen much higher since those days of the First World War. "People want to own a Rolex because it shows that they made it.". It is something to which you aspire and then treat yourself after a successful venture or a windfall.

Industry watchers say that what distinguishes Rolex from other premium timepieces is its signature look--a big, round face paired with a wide metal band--that's become as familiar on a basketball court as at a black-tie reception. Identifiable from across a room, the Rolex look has an unrivaled, near-universal appeal. Sportsmen value its ruggedness, adventurers its reliability and royalty its elegance. The design's evolution could be best described as glacial. There have been changes over the years, but it's all in the details. Take Rolex's first calendar watch, the Datejust. If you put a Datejust from 1945 beside a Datejust from 1998, you'll see the resemblance. There probably won't be a single part inside that's interchangeable, but the outward design has evolved ever so marginally."

This timeless appeal often translates into an excellent investment. At Christie's auction house in London last September, the excitement created by the sale of a private collection of 360 Rolex watches dating from the 1910s to the 1990s surprised even the most nonchalant pundits. The highlight of the auction was the sale of a cult icon--a late-1960s stainless-steel manual-wound Paul Newman Cosmograph Daytona (so named because the actor wore one in the 1969 racing flick Winning) that took the hammer for a cool $21,212, twice its estimated value. The Paul Newman, with its flashy dial and oversized indexes, wasn't an immediate success and was produced for a very limited time. Its meteoric ascent in popularity didn't begin until the mid-1980s. The Italians were the first to go for it. It was perfectly possible 16, 17 years ago to buy a Daytona at 20 to 25 percent under list price in England or America at the same time Italians would pay you 30 to 40 percent over list. Let's just say it was a nice little earner for quite a number of enterprising people.

By the time Daytona fever swept across Europe and the United States in the late 1980s, a relaunch was already in the works. Introduced in 1991, the updated Daytona replicated the original's racy chronograph--a built-in stopwatch that's perfect for timing the morning sprints of Kentucky Derby contenders or your nine-year-old's dash for first base--but added an automatic winder. Today, the $5,150 stainless-steel Cosmograph with a white face--the rarest combination and the one that Paul Newman reportedly wears off screen--is one of the country's most-coveted timepieces. The Daytona is actually worth more on the secondary market than its retail price. I mean, here's a watch that--assuming you could find one, that is--you could pick up new and turn around and resell for a $2,000 profit. And in steel.

But the best-known Swiss watchmaker has always been something of an outsider in Geneva. Perhaps it's because the company didn't start out Swiss. As mentioned, Rolex was founded in London, in 1905, by the 24-year-old Wilsdorf, a German who became a British citizen after taking an English bride. It was an era when national borders tended to define men's ambitions, but Wilsdorf thought big from the beginning. In 1908, before anyone had uttered the term multinational, Wilsdorf trademarked the word Rolex, a name that's easily pronounced in different languages and short enough to fit on a watch dial. It's said that Wilsdorf dreamed up the word while riding a London bus, having been inspired by the sound a watch makes as it is wound. Rolex didn't leave England until after the First World War, when an import tax hike of 33 percent made receiving its Swiss-made movements prohibitively expensive.

The company's first decade was driven by its founder's relentless obsession with precision. "Wilsdorf wasn't content merely to invent the first wristwatch. He wanted to invent the first truly accurate wristwatch, one that you could actually run your life by." Validation came in 1914, when London's Kew Observatory certified a Rolex wristwatch to be as precise as a marine chronometer. It was the first time that a watch had received "chronometer" status--a classification that, even today, is held by a relative few timepieces.

Still, improved accuracy didn't immediately transform the wristwatch into an essential item in the common man's wardrobe. Dust, heat and moisture had a way of wreaking havoc with a wristwatch's intricate mechanical movements, and the earliest models required too much maintenance to be practical. Rolex's big breakthrough came in 1926, when Wilsdorf developed a case that was impervious and waterproof. The secret was a revolutionary double-locking crown that screwed down on the case like a submarine hatch to create an airtight seal. Recalling his difficulty in prying open an oyster at a dinner party, Wilsdorf christened his creation the Rolex Oyster.

To launch his company's new timepiece into the popular consciousness, Wilsdorf came up with an ingenious publicity stunt. After learning that a young British woman named Mercedes Gleitze was planning to swim across the English Channel, he presented her with a Rolex Oyster and dispatched a photographer to chronicle her endeavor. When Gleitze emerged triumphantly from the sea, her Oyster was keeping perfect time and, true to its name, had remained waterproof. Wilsdorf capitalized with a splashy front-page ad in London's Daily Mail newspaper, touting "The Wonder Watch that Defies the Elements: Moisture Proof. Waterproof. Heat Proof. Vibration Proof. Cold Proof. Dust Proof." It was the genesis of the famous Rolex testimonial ad campaign that continues to this day.

If the first Oyster had an Achilles' heel, it was its winder button. The watch was hermetic only when the button was screwed down. To discourage people from toying with the winder, Wilsdorf came up with another innovation that propelled the industry forward even further. In 1931, Rolex introduced a "perpetual" rotor that literally rewound a watch with every flick of the wearer's wrist. The world's first successful automatic watch became the bedrock of the Rolex empire. "The Oyster Perpetual is really what makes a Rolex a Rolex--it's waterproof, with a tiny engine that you power every single time you move your arm."

Nearly 70 years later, the Oyster Perpetual has proved undaunted by the worst possible conditions. It has survived the depths of the sea with Jacques Piccard and the summit of Everest with Sir Edmund Hillary's Sherpa. It has retained its accuracy in subzero arctic temperatures, the scorching Sahara and the weightlessness of outer space. It has shrugged off plane crashes, shipwrecks, and speedboat accidents, broken the sound barrier, and been ejected from a fighter jet at 22,000 feet. Some of the most colorful recommendations are the cautionary tales: the Englishman who inadvertently laundered his Oyster in a scalding cycle, then rinsed, spun and tumble-dried it; the Australian skydiver who dropped his from 800 feet above the outback; or the Californian whose wife accidentally baked his in a 500-degree oven. In each case, the recovered Rolex was running perfectly.

By the advent of the Second World War, the Rolex name had become so prestigious in Britain that pilots in the Royal Air Force rejected inferior government-issued watches and used their paychecks to nearly deplete England's supply of Oyster Perpetuals. The compliment was duly returned: any British prisoner of war whose Rolex was confiscated had only to write to Geneva to receive a replacement. Yankee GIs returned home with a new trinket on their wrists. And so Rolex's romance with America began.

Though he lived in Geneva for 40 years, Wilsdorf never became a Swiss citizen. He died a Briton in 1960 and was remembered by colleagues as a good-humored, fatherly man who loved life as much as he loved a fine watch. Two years after his death, the company's board of directors appointed 41-year-old André Heiniger as Rolex's new managing director. While working under Wilsdorf for 12 years, Heiniger had come to share his boss' vision for the company, as well as his high energy level and sanguine outlook. All three traits proved invaluable when the Swiss watch industry found itself slipping into oblivion.

Just as video killed the radio star, the quartz boom of the late 1960s and early 1970s nearly snuffed out the mechanical timepiece faster than you can say "Seiko." By substituting low-cost, digital technology for labor-intensive artisanship, the Japanese sent the Swiss horology industry into crisis mode. Yet while most of Geneva's watch houses feverishly hitched their star to the digital bandwagon, Rolex stuck resolutely to its mechanical guns. By the time the dust had settled, more than half of Geneva's watch manufacturers had gone under. Fully a third of the survivors, including such prestigious names as Omega, Longines, Blancpain, Tissot, Rado, and Hamilton, were subsumed into a publicly owned consortium to avoid bankruptcy. This fate won't befall Rolex. Wilsdorf, an heirless widower at his death, created a private trust run by a board of directors to insure the company would never be sold.

What made Rolex so resilient? "The single most important thing that saved Rolex is that up until then the company had only been run by two managing directors: Hans Wilsdorf and André Heiniger. They really never had to worry about this quarter's results. They could think long-term appeal: 'Where will we be in five or ten years' time?' That's a completely different philosophy than at another watch house. Even in times of uncertainty, Rolex's greatest policy was never to adopt change for change's sake." Revealingly, the single quartz model developed by Rolex in the 1970s never exceeded 7 percent of the company's total production. (Today, that figure is 2 percent).

"If Rolex had gone to quartz there's no way it would have the image and prestige it has now." And being a private company without external shareholders, Rolex can better afford to remain aloof to fads than many of its counterparts. That means no chunky cases, no madcap numerals, no avant-garde shapes--nothing that's going to look dated in a decade's time.

In 1992, Patrick Heiniger replaced his father as Rolex's managing director. Both Heinigers share the twin virtues of undying optimism and ironclad discretion, according to colleagues. It's a combination that generates intrigue among rivals and industry observers. Montres Rolex S.A. is hugely secretive. Rolex always was an outsider company in Switzerland. Their top executives almost never do interviews. Essentially, their philosophy has always been to let the product speak for itself. At Rolex, the product is an obsession."

Consider the care taken to decorate the inside of a Rolex--the parts the wearer never even sees. At the company's Geneva headquarters, Rolex's craftsmen, dressed in white laboratory smocks, pull up to ergonomically designed workstations, then execute minute operations in near silence. Each component of every tiny movement is sculpted with swirls, lines or loops. Every angle is rounded and polished to a brilliant shine. This provides absolutely no value to the consumer, except as a gesture of the brand's refinement.

That Rolex has always produced its own movements separates it from other well-known mechanical brands. More than 200 craftsmen and technicians will work on a watch before it acquires Rolex certification. "There's so much more to a Rolex than the average person will ever need. And in that sense it's the Mercedes-Benz of wristwatches. It's over engineered. Not because Rolex wants to squander money but because that's just the way they do things."

Before leaving Geneva, every Rolex watch must travel through a high-tech obstacle course of quality-control checks. Every dial, bezel and winder will be checked and double-checked for scratches, dust and aesthetic imperfection. The microscopic distance between its hour and minute hands will be painstakingly calibrated to ascertain that they are lying perfectly parallel. An ominous-looking air-pressure chamber will verify that each watch is waterproof to a depth of 330 feet. (The Submariner and Sea-Dweller divers' models are guaranteed to 1,000 and 4,000 feet, respectively.) And every watch will engage in a precision face-off against an atomic-generated "überclock" that loses but two seconds every 100 years. Only after successfully passing dozens of checkpoints does a watch receive the Rolex seal.

Such attention to detail limits Rolex's production to about 650,000 watches a year, based on industry estimates. "That might sound like a lot," insists Lister of Christie's, "but it's very far below market demand." But, as André Heiniger once said, "We've never wanted to be the biggest, but certainly one of the finest in the field."


kredit to http://www.brittons-watches.co.uk

ISTILAH-ISTILAH BERKAITAN JAM

Aperture

Small opening. The dials of some watches (in French: montres à guichet) have apertures in which certain indications are given (e.g. the date, the hour, etc).

Applique

Applique or applied chapters are numerals or symbols cut out of a sheet metal and stuck or riveted to a dial.

Assembling

Process of fitting together the components of a movement. This was formerly done entirely by hand, but the operations have now been largely automated. Nevertheless, the human element is still primordial, especially for inspection and testing.

Assortiment

French term for the parts used for making an escapement.

Automatic Watch

A watch whose mainspring is wound by the movements or accelerations of the wearer's arm. On the basis of the principle of terrestrial attraction, a rotor turns and transmits its energy to the spring by means of an appropriate mechanism. The system was invented in Switzerland by Abraham-Louis Perrelet in the 18th century.

Balance

Moving part, usually circular, oscillating about its axis of rotation. The hairspring coupled to it makes it swing to and fro, dividing time into exactly equal parts. Each of the to-and-fro movements of the balance ("tick-tack") is called an "oscillation". One oscillation is composed of two vibrations.

Bar, lug

In wristwatch-cases, a thin metal rod fixed between the horns, for attaching the wristlet.

Barrel

Thin cylindrical box containing the mainspring of a watch. The toothed rim of the barrel drives the train.

Bridge Complementary part fixed to the main plate to form the frame of a watch movement. The other parts are mounted inside the frame (part of the "ébauche").

Calibre

Originally used to mean the size of a watch movement, this term now denotes a type of movement (men's calibre, automatic calibre, etc). When a calibre number is accompanied by the manufacturer's mark, it serves as an indication of origin.

(Watch-) Case

Container that protects the watch-movement from dust, damp and shocks. It also gives the watch as attractive an appearance as possible, subject to fashion and the taste of the public.

Casing (up)

Process of inserting and fixing a watch movement into its case.

Chablon

French term for a watch movement (not including the dial and hands), of which all or part of the components are not assembled.

Chronograph

Watch or other apparatus with two independent time systems: one indicates the time of day, and the other measures brief intervals of time. Counters registering seconds, minutes and even hours can be started and stopped as desired. It is therefore possible to measure the exact duration of a phenomenon. Not to be confused with the timer, the stopwatch and the chronometer.

Chronometer

Watch which has undergone a series of precision tests in an official institute. The requirements are very severe: a few seconds per day in the most unfavourable temperature conditions (for mechanical watches) and positions that are ordinarily encountered.

Crown

Knurled knob located on the outside of a watch case and used for winding the mainspring. It is also used for setting the hands to the right time and for correcting thecalendar indications.

Date Ordinal number referring to a day of the month: the 10th February. Date-watch: watch indicating the date, the month and sometimes the year and the phases of the moon. Also called a calendar-watch or calendar. Perpetual calendar: watch indicating leap years as well as the date.
Dial Indicating "face" or plate of metal or other material, bearing various markings to show, in ordinary watches and clocks, the hours, minutes and seconds. Dials vary verymuch in shape, decoration, material, etc. The indications are given by means of numerals, divisions or symbols of various types.
Direct-drive Refers to a seconds-hand that moves forwards in little jerks. Trotteuse, French term for a direct-drive seconds-hand, especially a centre seconds-hand.
Display Indication of time or other data, either by means of hands moving over a dial (analogue display) or by means of numerals appearing in one or more windows (digital or numerical display); these numerals may be completed by alphabetical indications (alphanumerical display) or by signs of any other kind. Example: 12.05 MO 12.3 = 12 hours, 5 minutes, Monday 12th March. Such displays can be obtained by mechanicalor electronic means.
Ebauche French term (but commonly used in English-speaking countries) for a movement blank, i.e. an incomplete watch movement which is sold as a set of loose parts, comprising the main plate, the bridges, the train, the winding and setting mechanism and the regulator. The timing system, the escapement and the mainspring, however, are not parts of the "ébauche".
Escapement Set of parts (escape wheel, lever, roller) which converts the rotary motion of the train into to-and-fro motion (the balance).
Etablissage French term for the method of manufacturing watches and/or movements by assembling their various components. It generally includes the following operations: receipt, inspection and stocking of the "ébauche", the regulating elements and the other parts of the movement and of the make-up; assembling; springing and timing; fitting the dial and hands; casing; final inspection before packing and dispatching.
Etablisseur French term for a watch factory which is engaged only in assembling watches, without itself producing the components, which it buys from specialist suppliers.
Factory, works In the Swiss watch industry, the term manufacture is used of a factory in which watches are manufactured almost completely, as distinct from an "atelier de terminage", which is concerned only with assembling, timing, fitting the hands and casing.
Fly-back Hand In a chronograph with analogue display, an additional centre second hand which can remain superposed on the other one as it moves, can be stopped independently and then made to "fly back" so as to catch up with the other hand, can be stopped and reset to zero together with the other hand. In chronographs with numerical display, a "function" having the same effect.
Glass, Crystal Thin plate of glass or transparent synthetic material, for protecting the dials of watches, clocks, etc.
Hand ndicator, usually made of a thin, light piece of metal, very variable in form, which moves over a graduated dial or scale. Watches usually have three hands showing the hours, minutes and seconds.
Jewel Bearing, endstone or pallet used for reducing friction. Generally made of synthetic material, except for the precious or semi-precious stones (ruby, sapphire, garnet) which are sometimes used in "de luxe" watches.
Main Plate Base plate on which all the other parts of a watch movement are mounted (part of the "ébauche").
Mainspring The driving spring of a watch or clock, contained in the barrel.
Manufacture d'horlogerie French term for a watch factory which itself produces the components (particularly the "ébauches") needed for the manufacture of its products (watches, alarm and desk clocks, etc).
Marine Chronometer Highly accurate mechanical or electronic timekeeper enclosed in a box (hence the term box chronometer), used for determining the longitude on board ship.Marine chronometers with mechanical movements are mounted on gimbals so that they remain in the horizontal position is necessary for their precision.
Middle
(of watch-case)
Middle part of the case, in which the movement is fitted.
Movement Assembly consisting of the principal elements and mechanisms of a watch or clock: the winding and setting mechanism, the mainspring, the train, the escapement, the regulating elements. "Anatomically", the movement consists of the "ébauche", the regulating elements and the other components.
Regulating Elements Set of parts comprising the regulating system (sprung balance) and the escapement (escape wheel, lever and roller).
Repeater Watch that strikes the hours by means of a mechanism operated by a push-piece or bolt. There are various types of repeaters. Quarter-repeater: sounding a low note for the hours and a "ding-dong" for each of the quarters; Five-minute repeater: striking the hours, quarters and five-minute periods after the quarter; Minute-repeater: striking the hours, quarters and minutes; Grande sonnerie (grand strike): striking the hours and quarters automatically and repeating when a push-piece is pressed down; Chiming repeater: in which the quarters are struck on three or four gongs of different pitch.
Rotor Half-disc of heavy metal, which is made to rotate inside the case of an automatic watch by the energy produced by the movements of the wearer's arm. Its weight tends always to bring it back to the vertical position. Demultiplied by a specially designed device, its rotations continually wind the mainspring of the watch.
Second Basic unit of time (abbr. s or sec), corresponding to one 86,000th part of the mean solar day, i.e. the duration of rotation, about its own axis, of an ideal Earth describing a circle round the Sun in one year, at a constant speed and in the plane of the Equator. After the Second World War, atomic clocks became so accurate that they could demonstrate the infinitesimal irregularities (a few hundreths of a second per year) of the Earth's rotation about its own axis. It was then decided to redefine the reference standard; this was done by the 13th General Conference on Weights and Measures in 1967, in the following terms: "The second is the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the fundamental state of the atom of caesium 133". Conventionally, the second is subdivised into tenths, hundredths, thousendths (milliseconds), millionths (microseconds), thousand-millionths (nanoseconds) and billionths (picoseconds).
Setting (to time) Process of bringing the hands of a watch or clock to the position corresponding to the exact time.
Shock Absorber Resilient bearing which, in a watch, is intended to take up the shocks received by the balance staff and thus protects its delicate pivots from damage.
Skeleton Skeleton watch: watch in which the case and various parts of the movement are of transparent material, enabling the main parts of the watch to be seen.
Stopwatch Timekeeping instrument which can be used for measuring intervals of time. When this is done, the time display is partly or wholly lost until the hands are reset.
Striking-work, Striking-Mechanism In a watch or clock, automatic or hand-operated mechanism that strikes the hours, etc, or rings an alarm-bell (v. repeater).
Tachometer Instrument for measuring speed. In watchmaking, a timer or chronograph with a graduated dial on which speed can be read off in kilometres per hour or some other unit (see timer).
Terminage French term denoting the process of assembling watch parts for the account of a producer.
Termineur French term for an independent watchmaker (or workshop) engaged in assembling watches, either wholly or in part, for the account of an "établisseur" or a "manufacture", who supply the necessary loose parts.
Timer Instrument used for registering intervals of time (durations, brief times), without any indication of the time of day.
Tourbillon Device invented to eliminate errors of rate in the vertical positions. It consists of a mobile carriage or cage carrying all the parts of the escapement, with the balance in the centre. The escape pinion turns about the fixed fourth wheel. The case makes one revolution per minute, thus annulling errors of rate in the vertical positions.
Vibration Movement of a pendulum or other oscillating element, limited by two consecutive extreme positions. The balance of a mechanical watch generally makes five or six vibrations per second (i.e. 18,000 or 21,600 per hour), but that of a high-frequency watch may make seven, eight or even ten vibrations per second (i.e. 25,200, 28,800 or 36, 000 per hour).
Watch Material Loose parts, components either for producing watches or for repairing them. In the latter case, they are often called "spare parts" or "repair material".
Water Resistant Made to prevent water from entering. Water-resistant case, watch-case whose joints are made to prevent moisture from entering.
Winding Operation consisting in tightening the mainspring of a watch. This can be done by hand (by means of the crown) or automatically (by means of a rotor, which is caused to swing by the movements of the wearer's arm).

"T Swiss Made T" or "Swiss T 25" : what does it mean ?

"T Swiss Made T" or "Swiss T 25" : what does it mean ?

In order for timepieces to be read in the dark, a luminescent material is laid on the dial indexes and hands. Generally speaking, the emission of light is either of photoluminescent type (determined by a exciting luminous radiation) or of radioluminescent type (determined by the radioactivity of the material).

Timepieces featuring radioluminescent emission are mostly designed for very specific uses : military watches, professional divers watches, etc. In this case, the use of radioactive material is strictly defined by ISO 3157 Standard which allows only two types of radionucleides : tritium (3H) and promethium (147 Pm). It is important to specify that these radionucleides emit a radiation of low energy.

ISO 3157 Standard allows an optional marking for timepieces emitting less than a certain value. The marking may be made on the dial as follows :

deposits activated by tritium : T

deposits activated by promethium : Pm

On the other hand, timepieces with a higher value, such as divers' watches, must be marked as follows :

deposits activated by tritium : T 25

deposits activated by promethium : Pm 0,5

The indication "T Swiss made T" means that the watch is Swiss and contains a certain quantity of tritium that emits less than 227 MBq (7,5 mCi).The indication "Swiss T<25">

Most of the Swiss watches use a light emission of photoluminescent type. Some of them bear the optional marking "L Swiss Made L" to indicate it.

It says "water resistant", but can I swim with it ?

It says "water resistant", but can I swim with it ?

Water resistance is measured in bars (unit of pression, 1 bar being equivalent to 1 atmosphere), and watches are tested at these pressures for certain period of time. Exceptional pressure, as when diving, may exceed those limits, so if you are a keen diver you will need a watch that can tolerate that pounding.
Translation varies and your best guide is your supplier as it will almost certainly be part of the guaranteee.

Manufacturers often measure water resistance to a number of feet (ft), meters (m) or atmospheres (atm). Watches marked "water resistant" with or without additional indication of high pressure must comply with NIHS 92-10 watch Standard (corresponding to ISO 2281 international Standard). Such watches are designed for everyday life and must be water resistant during exercices such as short swimmings. They can be worn in different temperature and pressure conditions but are under no circumstances designed for scuba diving.

Divers' watches must be water resistant at 330 ft minimum. They must also feature a time controller and comply with standards provided by NIHS 92-11 (ISO 6425) : luminosity, shock resistance, anti-magnetism, band solidity.

Remember that if you are going to be moutain climbing, parachuting, sky diving, hang gliding, or skiing, it is advisable to use a watch that is atm damage-protected as pressures change both above and below sea level.

For regular water use, solid metal cases or specially constructed products are recommended, including screwed-in case backs and crowns.
Do not hesitate to ask your next dealer about water resistance functions, and remember that only professional changing battery will guarantee the seals and thus the water resistance of your timepiece.

Apa yang dikatakan Swiss Made

Apa yang dikatakan Swiss Made

Jika anda baru dalam dunia horologi dan inginkan jam tangan berkualiti, hanya cari perkataan ‘Swiss Made’ yang tertera pada dail. Menurut undang-undang Eropah yang mengawal penggunaan nama ‘Swiss’ untuk jam tangan, perkataan jam tangan Swiss Made bermaksud jam yang telah dipasang, dilaraskan dan menjalani ujian rasmi di Switzerland. Selain itu, sekurang-kurangnya 50% daripada komponen gerakan harus diperbuat di Switzerland.

Apakah makna label Swiss Made kepada anda?

Perkataan ‘Swiss Made’ menjamin standard dan jaminan kualiti tertinggi. Ia termasuk kualiti teknikal jam tangan (ketepatan, kebolehpercayaan, tahan air dan tahan gegaran), di samping kualiti estetiknya (keanggunan dan keaslian rekaan). Jaminan ini meliputi pengeluaran tradisional dan teknologi baru.

Apa yang terdapat di sebalik reputasi ini?

Nilai teras label Swiss Made bukan sahaja menggambarkan jam tangan berkualiti tinggi, tetapi ia juga mengekalkan standardnya yang tinggi, memberikan pengguna jaminan terbaik. Nama Swiss Made menghadapi persaingan kuat, namun, terima kasih kerana infrastrukturnya yang unik, kepandaian, serta semangat inovasi, ia telah berjaya mengekalkan kedudukan pendahulunya.

Bagaimanakah ‘Swiss Made’ ditakrifkan oleh undang-undang?

Jam tangan ditakrifkan sebagai Swiss Made hanya apabila mempunyai tanda ‘Swiss Made’ atau ‘Swiss’, atau sebarang ekspresi lain yang mengandungi perkataan ‘Swiss’ atau terjemahannya. Menurut undang-undang Swiss, jam tangan dianggap Swiss jika:

  • Pergerakannya adalah Swiss
  • Pergerakannya dipasang bingkai di Switzerland
  • Pengilang melakukan pemeriksaan akhir di Switzerland

Pergerakan Jam Tangan Swiss dianggap Swiss, jika:

  • Ia teIah dipasang di Switzerland
  • Ia telah diperiksa oleh pengilang di Switzerland
  • Komponen pengeluaran Swiss merupakan sekurang-kurangnya 50 peratus daripada jumlah nilai, tanpa mengambil kira kos pemasangan