Seiko 7731 Movement Details
Seiko caliber 7731 is an analog quartz watch movement. Production was in the 1980s.
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|Battery:||SR916SW / 373 (Silver oxide)|
|Day / date?||No|
|GMT / world time?||No|
|Number of jewels:||3|
|Development division:||Daini (Kameido, Tokyo)|