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  2. Astron (wristwatch) - Wikipedia

    en.wikipedia.org/wiki/Astron_(wristwatch)

    Within one week 100 gold watches had been sold, at a retail price of 450,000 yen (US$1,250 (equivalent to $10,386 in 2023)) each (at the time, equivalent to the price of a medium-sized car). [1] Essential elements included a XY-type quartz oscillator of 8192 Hz (8192 = 2 13 ), a hybrid integrated circuit , and a phase locked ultra-small ...

  3. Seikosha - Wikipedia

    en.wikipedia.org/wiki/Seikosha

    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.

  4. Seiko - Wikipedia

    en.wikipedia.org/wiki/Seiko

    On January 10, 2014, on the eve of the Australian Open in Melbourne, Shinji Hattori, President of Seiko Watch Corporation, presented to Novak Djokovic a Seiko Astron GPS Solar limited edition worth $1700. It was launched worldwide with a million units, symbolizing Seiko's partnership with the world's no.1 professional tennis player.

  5. List of most expensive watches sold at auction - Wikipedia

    en.wikipedia.org/wiki/List_of_most_expensive...

    A Patek Philippe pocket watch. This list of most expensive watches sold at auction documents the watches sold at auction worldwide for at least 1.5 million US dollars.The final price listed is the total price paid by the buyer converted to US dollars, according to the currency exchange rate at the time of auction.

  6. Quartz crisis - Wikipedia

    en.wikipedia.org/wiki/Quartz_crisis

    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.

  7. Seiko Group - Wikipedia

    en.wikipedia.org/wiki/Seiko_Group

    Seiko Watch delegates the manufacture of some of its high-end quartz and spring drive watches (Seiko Astron, Grand Seiko, Credor, etc) to the Wearable Products Operations Division of Epson. Time Module (TMI), a member of the Seiko Group, was established in 1987 with funding from Seiko Watch Company, Seiko Instruments Inc., and Seiko Epson Corp ...