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Date display in big window, ETACHRON with finetiming device 2897 [18] Yes Yes sweep second Yes No Yes Yes ETACHRON Power-reserve display 2894-2 [19] Yes Yes small second Yes No Yes Yes ETACHRON Chronograph mechanism with cams, 2 push buttons, chronograph 60 seconds, dragging counters 30 minutes and 12 hours 2834-2 [20] Yes Yes sweep second Yes ...
Georges Louis Ruedin (1870–1935), Swiss watch producer, Berner Jura, director of the Société Horlogère Reconvilier. Jens Olsen (1872–1945), Danish clockmaker, Ribe, astronomical world clock in Copenhagen. Jämes Pellaton (1873–1954), Swiss watchmaker, Le Locle, tourbillon. Louis Cartier (1875–1942), French watchmaker, Paris, Cartier ...
Tissot introduced the first mass-produced pocket watch as well as the first pocket watch with two time zones in 1853 and the first anti-magnetic watch, in 1929–30. [5] Tissot was also one of the first companies to manufacture an antimagnetic wristwatch in the early 1930s. [ 13 ]
That is, the watch should not delay at all, and the upper limit is 5 seconds fast in 24 hours. The criterion of resistance to magnetic fields is innovative. Until now, the ISO 764 Horology — Magnetic resistant watches standard defines that an antimagnetic watch must support a magnetic field of 4,800 A/m, which corresponds to 60 gauss. METAS ...
A balance wheel, or balance, is the timekeeping device used in mechanical watches and small clocks, analogous to the pendulum in a pendulum clock.It is a weighted wheel that rotates back and forth, being returned toward its center position by a spiral torsion spring, known as the balance spring or hairspring.
Mathey-Tissot no longer produces its own watch movements in house. Instead, the company customizes mechanical and quartz watches with movements sourced from others. [4] Its logo is similar to the "peace symbol" of the Campaign for Nuclear Disarmament, but turned upside-down, with the words Mathey-Tissot in manuscript, above the printed words "since 1886".
Tachymeter scale on a Citizen watch bezel. A tachymeter (pronounced / t æ ˈ k ɪ m ə t ər /) is a scale sometimes inscribed around the rim of an analog watch with a chronograph.It can be used to conveniently compute the frequency in inverse-hours of an event of a known second-defined period, such as speed (distance over hours) based on travel time (distance over speed), or measure distance ...
Jewel bearing of a balance wheel, supported by a lyre-shaped spring. The Incabloc shock protection system is the trade name for a spring-loaded mounting system for the jewel bearings that support the balance wheel in a mechanical watch, to protect the wheel's delicate pivots from damage in the event of physical shock, such as if the watch is dropped.