Complication-Piaget or IWC, the patent for Intramatic was licensed to Baume & Mercier, Bulova and Hamilton (used in the "Thin-O-Matic" line). The patent for Superslender was licensed – together with Universal of Geneva to other firms, eg. The watch was called „Superslender“ (calibres 10 and produced from 1957 onwards), then adapted to „Intramatic“(cal. 525 was started, an automatic bumper movement watch, in 1953 the automatic calibres 535-539 with „Rotowind“(with second hand from center, or power reserve indication).ġ954 Buren established the patent for its Minirotor – the small rotor integrated at the same level as the rest of the movement, which can thus get very flat. All parts were still manufactured inhouse.ġ945/6 the fabrication of cal. by the calibre 300, 280 (very flat with 2,8 mm, and acclaimed as very precise, in 1960), and cal. Buren participated in the race to ever flatter watches, e.g. to sell the facilities in Büren to a local group of new shareholders and the swiss-american financier Roland Gsell.įrom 1932 onwards the „Buren Watch Company S.A.“ developed rapidly new wrist watch calibres ( no. The crisis after 1929 forced Williamson Ltd. Annual production in Büren was about 200'000 time-pieces. In 1925 a patent for the stones used as bearings was granted, these stones being pressed into their place, as applied today in every watch.īetween 19 a broad set of pocket and wrist watches was developed (calibres 373, 25, 335, 385, 375, 378, 875, 415, 400 tonneau, 975, 460, 461, 462, 293 and 70). From 1916 to 1923 a kind of interchangeable parts for the different calibres were developed. London bought the label and the factory, increasing the production of pocket watches in many calibres, all manufactured completely inhouse. Suter-Antenen produced pocket watches, first with cilinder escapement, after 1885 with Anker escapement, winding with key.ġ898 H.
"Founded 1873 in Büren, a medieval little town at the river Aare in Switzerland, by Fritz Suter-Antenen. and the Swiss factory became Buren Watch Hamilton. This occurred in 1932 when the employees bought the plant and it became The Buren Watch Co., Switzerland. This came to an end during the Great Depression and Buren came to be an independent Swiss firm. Ads in the 1920's proclaimed Buren to be "The Perfect Watch" and boasted of the linking up of Swiss watch manufacturing with British Enterprise and Capital. Williamson, bought a watch factory in Switzerland and created the Buren Watch Company. "From 1899 to 1932, Buren was the Swiss factory of H.
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