Seiko 8V20 Movement Details

Seiko caliber 8V20 is an analog quartz watch movement.
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Battery:SR1130W / 389 (Silver oxide)
Accuracy:±20 seconds/month
Day / date?No
GMT / world time?No
Number of jewels:0
Size / diameter:29.1mm
Notes:Has an alarm and countdown timer. Each function is selected by rotating the bezel.
PDF guides: Battery reset guide
Technical guide for 8V20A
Related movements: 8V22