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seiko_39

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seiko_39 [11.10.2021 21:09]
127.0.0.1 external edit
seiko_39 [06.12.2021 17:53] (current)
gerdlothar
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 ===== History ===== ===== History =====
-[[Seiko]] was quietly racing to develop a [[quartz watch]] movement in the 1960s, and delivered their first [[Seiko 35|Cal. 35]] movement to the [[Neuchatel Observatory]] in late [[1967]], just a few months after the [[CEH]] delivered their [[Beta 21|"Beta" quartz movement prototypes]]. A product of [[Suwa Seikosha]] Cal. 35 used a 8,192 Hz of 16,384 Hz quartz crystal and an [[integrated circuit]] from [[Intersil]] in the USA. Seiko offered Cal. 35 SQ for sale in the [[Seiko Astron]] watch on Christmas Day, [[1969]], with 100 examples sold in the first month. Suwa rival [[Daini Seikosha]] developed [[Cal. 36]] and launched it in [[1970]], but neither movement was truly produced in volume. Suwa Seikosha developed [[Seiko 38|Cal. 38]] as a full-production midrange to high-end quartz movement, and it incorporates many advanced features including a [[CMOS]] [[integrated circuit]] and 16 KHz or 32 KHz crystal.+[[Seiko]] was quietly racing to develop a [[quartz watch]] movement in the 1960s, and delivered their first [[Seiko 35|Cal. 35]] movement to the [[Neuchatel Observatory]] in late [[1967]], just a few months after the [[CEH]] delivered their [[Beta 21|"Beta" quartz movement prototypes]]. A product of [[Suwa Seikosha]] Cal. 35 used a 8,192 Hz of 16,384 Hz quartz crystal and an [[integrated circuit]] from [[Intersil]] in the USA. Seiko offered Cal. 35 SQ for sale in the [[Seiko Astron]] watch on Christmas Day, [[1969]], with 100 examples sold in the first month. Suwa rival [[Daini Seikosha]] developed [[Seiko 36|Cal. 36]] and launched it in [[1970]], but neither movement was truly produced in volume. Suwa Seikosha developed [[Seiko 38|Cal. 38]] as a full-production midrange to high-end quartz movement, and it incorporates many advanced features including a [[CMOS]] [[integrated circuit]] and 16 KHz or 32 KHz crystal.
  
 Daini's second quartz movement was Cal. 39, a high-end movement that competed with the best from the [[Seiko 38|Cal. 38 family]]. Cal. 39 movements feature a flashing [[LED]] to serve as a running indicator prominently featured on the dial above the 1 00 marker. The 39SQ line was differentiated mainly by the rectangular cases, which were quite different from the "shield" style round watches in the 38SQ line. This is due to the rectangular shape of the movement, which includes two batteries. Daini's second quartz movement was Cal. 39, a high-end movement that competed with the best from the [[Seiko 38|Cal. 38 family]]. Cal. 39 movements feature a flashing [[LED]] to serve as a running indicator prominently featured on the dial above the 1 00 marker. The 39SQ line was differentiated mainly by the rectangular cases, which were quite different from the "shield" style round watches in the 38SQ line. This is due to the rectangular shape of the movement, which includes two batteries.
seiko_39.txt · Last modified: 06.12.2021 17:53 by gerdlothar

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