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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. 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.

  4. 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.

  5. 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.

  6. 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.

  7. Watch - Wikipedia

    en.wikipedia.org/wiki/Watch

    The commercial introduction of the quartz watch in 1969 in the form of the Seiko Astron 35SQ, and in 1970 in the form of the Omega Beta 21 was a revolutionary improvement in watch technology. In place of a balance wheel, which oscillated at perhaps 5 or 6 beats per second, these devices used a quartz-crystal resonator , which vibrated at 8,192 ...