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At the time, Suwa Seikosha Co. was in charge of manufacturing men's watches, so it was decided that Suwa would produce the first Grand Seiko. The first Grand Seiko, released in 1960, was based on Seiko's previous high-end watch, CROWN. This Grand Seiko has a 25-jewel, manual-winding, 3180 caliber, and its production was limited to 36,000 units ...
While competitive chronometer testing took place at the observatories in Neuchâtel (1866–1975) and Geneva (1873–1967), testing of large numbers of watches intended for public sale was conducted by the independent Bureaux officiels de contrôle de la marche des montres (B.O.s) established between 1877 and 1956.
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Early automatic quartz movements were called AGS (Automatic Generating System). In 1991 the company introduced the Kinetic brand name. [4] Today Seiko offers a wide range of watches with various Kinetic movements. The top of the line is the caliber 9T82, included in Sportura (international brand) and PROSPEX (only marketed in Japan) Collection.
[47] [52] In December 1969, Seiko produced the world's first commercial quartz wristwatch, the Seiko Quartz-Astron 35SQ [53] [54] which is now honored with IEEE Milestone. [55] [56] The Astron had a quartz oscillator with a frequency of 8,192 Hz and was accurate to 0.2 seconds per day, 5 seconds per month, or 1 minute per year. The Astron was ...
In 2019, Seiko released several limited edition Astron models to commemorate the 50th anniversary of the quartz Astron. [5] [6] Among them, the model produced in a limited edition of 50 pieces (3.8 million yen) mimics the original case design and has a rough engraving pattern by craftsmen belonging to Epson's "Micro Artist Workshop".
In 1971 Girard-Perregaux introduced the Caliber 350, with an advertised accuracy within about 0.164 seconds per day, which had a quartz oscillator with a frequency of 32,768 Hz, which was faster than previous quartz watch movements and has since become the oscillation frequency used by most quartz clocks. [21] [22]
The Royal Orient line was discontinued around 2016, likely to prevent cannibalism between it and fellow Seiko group brands Grand Seiko, and Credor. To celebrate 70 years of the Orient Star line, the Orient Star skeleton watch was introduced with a silicon escapement made using Epson's MEMS technology, which has been used in high end Seiko ...