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The Model 21 Hamilton Marine Chronometer for large vessels was built first and had a chain-drive fusee, the second hand advanced in 1 ⁄ 2-second increments over a 60-second-marked sub-dial, and was kept in a traditional gimbaled double box for the express purpose of keeping the clock in a "dial up" position to minimize ship-movement-induced ...
Added to NRHP. August 14, 1982. Designated CP. September 7, 2001. The Hamilton Watch Complex is a former industrial complex in Lancaster, Pennsylvania. It was owned by the Hamilton Watch Company and was used as their headquarters from its founding in 1892 until 1980. The complex was listed on the National Register of Historic Places in 1982.
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. The company's historic 19th-century manufacturing ...
German clockmakers. Johann Baptist Beha (1815–1898) Gustav Becker Clock Company; Freiburg in Schlesien, Silesia (1850–1938) Florn. Thomas Haller (Thomas Haller AG), Schwenningen (1880-1900) then merged with Junghans. Thomas Ernst Haller (Haller AG), Schwenningen (1902-1928) then merged with Kienzle.
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 ...
A torsion pendulum clock, more commonly known as an anniversary clock or 400-day clock, is a mechanical clock which keeps time with a mechanism called a torsion pendulum. This is a weighted disk or wheel, often a decorative wheel with three or four chrome balls on ornate spokes, suspended by a thin wire or ribbon called a torsion spring (also ...
History. Howard Miller Clock Company was founded in 1926, as the Herman Miller Clock Company division of office furniture manufacturer Herman Miller, specializing in chiming wall and mantle clocks. [2] It was spun off in 1937 and renamed, under the leadership of Herman Miller's son Howard C. Miller (1905–1995). [3]
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 ...