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Download as PDF; Printable version; In other projects Wikidata item; Appearance. ... 1080 (manual wind, sweep-second, 17/19/21 jewels, 18000vph, reserve 42h) See also
The Casio F-91W is a digital watch manufactured by Japanese electronics company Casio. Introduced in June 1989 [1] as a successor of the F-87W, [2] it is popular for its low price, long battery life and iconic design. [3] As of 2011, annual production of the watch is 3 million units, which makes it the most sold watch in the world. [4]
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.
Benrus is an American watchmaking and lifestyle company founded as a watch repair shop in New York City in 1921 by Romanian-American Benjamin Lazrus and his two brothers. [ 1 ] [ 2 ] Benrus watches were worn for decades by the U.S. military from World War II through Vietnam .
Mechanical watch movements are also classified as manual or automatic: Manual or hand winding In this type the wearer must turn the crown periodically, often daily, in order to wind the mainspring, storing energy to run the watch until the next winding. Automatic or self-winding
The manual winding Speedmaster Professional or "Moonwatch" is the best-known and longest-produced; it was worn during the first American spacewalk as part of NASA's Gemini 4 mission, and was the first watch worn by an astronaut walking on the Moon during the Apollo 11 mission.
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A Casio Wave Ceptor WV-200DE watch. The Multi-Band 5 indicates that it can receive time calibration signals from five radio towers in the world The Wave Ceptor series (stylized as WAVE CEPTOR or WaveCeptor ) is a line of radio-controlled watches by Casio .