Seiko 3870 Movement Details
Seiko caliber 3870 is an analog quartz watch movement. Production was in the 1970s.
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|Battery:||SR44SW / 303 (Silver oxide)|
|Day / date?||No|
|GMT / world time?||No|
|Development division:||Suwa (Nagano Prefecture, Japan)|
|Notes:||Used in pocket watches.|