L'impermeable
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{{short description, First waterproof watch L'impermeable is the name of the first waterproof watch invented at the end of the 19th century and manufactured by the ''
West End Watch Co West End Watch Company is a manufacturer of watches located at Leytron (Switzerland). It was established in 1886 and has been in business for more than 120 years. The company has produced and distributed more than 15 million watches worldwide si ...
mpany'', one of the oldest Swiss brands still active.


Definition of epoxy waterproofing

Waterproof (or water-resistant) describes objects unaffected by water or resisting water passage, or which are covered with a material that resists or does not allow water passage. In horology, the waterproofness of a watch is defined by its resistance under pressure. The manufacturers indicate mostly the degree of waterproofness in metres (m), feet (ft) or atmospheres (atm). Watches with the "waterproof" name, with or without indication of overpressure, have to be complied and have to undergo successfully the tests planned in the standard ISO-2281. These watches are intended for a current daily use and have to resist to the water during exercises such as the short-term swimming. So finally watches said waterresistant must : resist to a dive in the water in a depth of at least 100 metres (330 ft), have a system of control of time and answer all the criteria planned by the standard ISO 6425: luminosity, shock resistance, resistance in magnetic fields, solidity of the bracelet.


History

The watchmaker company "Alcide Droz & Sons", established in
St-Imier Saint-Imier () is a municipality in the Jura bernois administrative district in the canton of Bern in Switzerland. It is located in the French-speaking Bernese Jura (''Jura Bernois''). The Observatoire Astronomique de Mont-Soleil is located ab ...
(
Bern Bern (), or Berne (), ; ; ; . is the ''de facto'' Capital city, capital of Switzerland, referred to as the "federal city".; ; ; . According to the Swiss constitution, the Swiss Confederation intentionally has no "capital", but Bern has gov ...
) since 1864, developed the first watch attested
waterproof Waterproofing is the process of making an object, person or structure waterproof or water-resistant so that it remains relatively unaffected by water or resists the ingress of water under specified conditions. Such items may be used in wet env ...
. They called it "L'Impermeable". They had the idea to place a seal in the crown of winder, which is screwed on the counterpart. "L'Impermeable" was born: it is the very first waterproof watch intended especially to protect the movement from dust and humidity.article about the origin of the diver's watch, magazine "The world of the watchmakers" (no 4, Dec. 2003) This pocket watch is nowadays on display at the International Watchmaking Museum in
La Chaux-de-Fonds La Chaux-de-Fonds (; archaic ) is a Swiss city in the canton of Neuchâtel. It is located in the Jura Mountains at an altitude of 992 metres, a few kilometres south of the French border. After Geneva, Lausanne, Biel/Bienne, and Fribourg, ...
.


See also

*
West End Watch Co West End Watch Company is a manufacturer of watches located at Leytron (Switzerland). It was established in 1886 and has been in business for more than 120 years. The company has produced and distributed more than 15 million watches worldwide si ...
* www.westendwatchusa.com *
waterproof Waterproofing is the process of making an object, person or structure waterproof or water-resistant so that it remains relatively unaffected by water or resists the ingress of water under specified conditions. Such items may be used in wet env ...


References


External links


International Watchmaking Museum
Horology Watches