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In 1978, Seiko introduced the world's first quartz diver's watch with a water resistance of 600 meters; in 1982, the world's first wristwatch with a television; in 1983, the world's first wristwatch with a record-and-play function and an analog quartz chronograph; in 1984, the world's first wristwatch computer; and in 1986, the world's first ...
A diving watch, also commonly referred to as a diver's or dive watch, is a watch designed for underwater diving that features, as a minimum, a water resistance greater than 1.1 MPa (11 atm), the equivalent of 100 m (330 ft). The typical diver's watch will have a water resistance of around 200 to 300 m (660 to 980 ft), though modern technology ...
The Spring Drive uses a conventional mainspring [3] and barrel [4] along with automatic and/or stem winding to store energy, just as in a mechanical watch. [3] However, the escapement and balance wheel in mechanical watches is replaced by Seiko's Tri-synchro Regulator system, a phase-locked loop wherein a rotor, which Seiko refers to as a "glide wheel", is powered by the mainspring barrel via ...
The watch can be used to calculate decompression times, and other information useful to divers. It was originally rated to a depth of 300 meters, later increased to 750 meters. In 1968 DOXA became part of Synchron S.A. Soon after the introduction of the Sub300t, the Swiss watch industry was devastated by the introduction of quartz watches.
The Amphibia creation was led by Vostok's chief of their new design bureau. The objectives were to create a watch that was competitive with contemporary diving watch such as the Blancpain 50 Fathoms, the Rolex Submariner and the watches using the compressor case, and to create a watch that could operate reliably at the temperature and pressure of 20 atmospheres (and later 30 atmospheres).
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 ...