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MIL-W-46374 is a specification first published on October 30, 1964, [1] for US military watches. [2] The 46374 was specified as an accurate, disposable watch. In its span, it encompassed metal and plastic cased watches with both mechanical and quartz movements. [2] The 46374 replaced the MIL-W-3818, reducing cost and inheriting the dial from ...
In 1990, the Tianjin Watch Factory was awarded the status of a national company, and in 1992, the Tianjin Seagull Corporation was founded. That same year, the decision was made to discontinue the production of mechanical watches in favour of quartz watches; five years later it came to a complete reversal of this decision.
In modern quartz watches, the timekeeper is a quartz crystal in an electronic circuit, powering a small stepper motor. Because of the small amount of torque needed to move the hands, there is almost no pressure on the bearings and no real gain by using a jewel bearing, hence they are not used in a large proportion of quartz movements.
In 2012 Citizen announced the Eco-Drive RING Concept Model. This watch features a ring-shaped solar cell surrounding the watch case sidewall. [13] [14] In 2018 Citizen announced it developed the Caliber 0100 Eco-Drive prototype autonomous high-accuracy quartz watch movement which is claimed to be accurate to ± 1 second per year. [15]
Ronda AG is a Swiss manufacturer of quartz and mechanical watch movements. [1] The company was founded in 1946 by William Mosset and the current headquarters are located in Lausen, Basel-Landschaft. [2] Their movements are used in a variety of watches around the world, including RSC pilot's watches, Shinola, Prim and Mondaine watches. [3] [4 ...
Though the movement was the predominantly-produced watch movement in China until sometime in the 1980s, its manufacture was not immune to the quartz crisis of the watch industry that occurred during that decade; changes in economic policy, replacement designs, factory closings, and the re-purposing of a number of Chinese watch-producing ...
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