Seiko 0644 Movement Details

Seiko caliber 0644 is a digital watch movement. Production was in the 1970s.
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Sub-brands: LC
Battery:SR43W / 386 (Silver oxide)
Accuracy:±15 seconds/month
Day / date?No
GMT / world time?No
Chronograph?No
Alarm?No
Rate:32,768 Hz
Size / diameter:27.0mm
Height:8.5mm
Development division:Suwa (Nagano Prefecture, Japan)
PDF guides: Technical guide : 0644A & 0664A
Related movements: 0624 0664