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Bulova claims to have been the first manufacturer to offer electric clocks beginning in 1931, but the Warren Telechron Company began selling electric clocks in 1912, 19 years prior to Bulova. In the 1930s and 1940s, the brand was a huge success with its rectangular plated watches whose case was strongly curved to better fit the curve of the wrist.
Standard-quality 32 768 Hz resonators of this type are warranted to have a long-term accuracy of about six parts per million (0.0006%) at 31 °C (87.8 °F): that is, a typical quartz clock or wristwatch will gain or lose 15 seconds per 30 days (within a normal temperature range of 5 to 35 °C or 41 to 95 °F) or less than a half second clock ...
Wittnauer is a watch and clock company, founded in New Rochelle, New York in 1885 by Swiss immigrant Albert Wittnauer, that is now a brand of the Bulova company, which is owned by Japanese conglomerate Citizen Watch Co.
Max Hetzel (born 1921), Swiss physician, Biel, Bulova Accutron. Hans Lang (1924–2013), German watchmaker, astronomical clocks. George Daniels (1926–2011), , English watchmaker, Master of the Worshipful Company of Clockmakers., Inventor of the coaxial escapement. Richard Mühe (1929–2009), German watchmaker, Furtwangen.
Watches, clocks, aircraft clocks The Waltham Watch Company , also known as the American Waltham Watch Co. and the American Watch Co. , was a company that produced about 40 million watches, clocks, speedometers, compasses, time delay fuses, and other precision instruments in the United States of America between 1850 and 1957.
Timex Group USA, Inc. (formerly known as Timex Corporation) is an American global watch manufacturing company founded in 1854 as the Waterbury Clock Company in Waterbury, Connecticut. In 1944, the company became insolvent but was reformed into Timex Corporation .
The common frequencies used in watches were 300 Hz (ESA MOSABA cal. 9162, 9164 and 9210), 360 Hz (Bulova Accutron [9] cal. 214 and 218), Slava Transistor, Tianjin 'Yinchabiao', Prim Elton, 480 Hz (Bulova Accutron cal. 2300) and 720 Hz (Omega Megasonic cal. 1220 and 1230). Omega F300Hz and Speedsonics series are common examples of ESA MOSABA ...
The hand-winding movement of a Russian watch. A mechanical watch is a watch that uses a clockwork mechanism to measure the passage of time, as opposed to quartz watches which function using the vibration modes of a piezoelectric quartz tuning fork, or radio watches, which are quartz watches synchronized to an atomic clock via radio waves.