Dating seiko quartz
Currently watch movements are made in Shizukuishi, Iwate (SII Morioka Seiko Instruments), Ninohe, Iwate (SII Ninohe Tokei Kogyo), Shiojiri, Nagano (Seiko Epson) and their subsidiaries in China, Malaysia and Singapore.
The fully integrated in-house production system is still practised for luxury watches in Japan.
Seiko later went on to introduce the first quartz chronograph.
In the late 1980s, Seiko produced the first automatic quartz that combined the self-energizing attributes of an automatic watch with quartz accuracy.
One was Daini Seikosha Co.,(now known as Seiko Instruments Inc.), and the other was Suwa Seikosha Co.(now known as Seiko Epson Corporation).
These elements help improve the legibility of the watch under different situations, and create a sharp, crisp visual impression: In 1968, Seiko introduced three 10 beat (10 ticks per second) calibers, the automatic caliber 61GS, the manual winding 45GS and 19GS for women's watch.
The 61GS was Japan's first automatic 10 beat watch, and it was the most accurate mechanical watch due to the high beat calibers.
Although creating the parts that enabled quartz watches, Seiko did not monopolize the patent rights for the unique pieces, but decided to open them.
In 1973, Seiko announced the world’s first LCD quartz watch with six-digit digital display.