Seiko M421 Movement Details

Seiko caliber M421 is a digital watch movement.
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Battery:CR2016 / (Lithium)
Accuracy:±15 seconds/month
Day / date?Day + date
GMT / world time?Yes
Chronograph?Yes
Rate:32,768 Hz
Size / diameter:26.0mm
Height:4.8mm
Development division:Daini (Kameido, Tokyo)
PDF guides: Battery reset guide
Technical guide for M421A
Related movements: M422