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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".
On 25 December 1969, Seiko released the world's first quartz watch, the Seiko Quartz ASTRON, marking the beginning of the quartz revolution. [68] [69] [70] The watch used a crystal oscillator for accuracy, where the crystal generates steady vibration when voltage is applied to it. During the ten years of development at Suwa Seikosha, Seiko ...
Quartz movement of the Seiko Astron, 1969. The quartz crisis (Swiss) or quartz revolution (America, Japan and other countries) was the advancement in the watchmaking industry caused by the advent of quartz watches in the 1970s and early 1980s, that largely replaced mechanical watches around the world.
[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.
Seiko Quartz Astron 35SQ, the world's first commercial quartz watch developed by Suwa Seikosha. 1881 — Kintarō Hattori opens the watch and jewelry shop "K. Hattori" (Hattori Tokeiten in Japanese; currently named Seiko Holdings Corporation) in the Ginza area of Tokyo, Japan.
In 1959, Seiko placed an order with Epson (a daughter company of Seiko and the 'brain' behind the quartz revolution) to start developing a quartz wristwatch. The project was codenamed 59A. [ 41 ] By the 1964 Tokyo Summer Olympics, Seiko had a working prototype of a portable quartz watch which was used as the time measurements throughout the event.
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