Seiko D138 Movement Details

Seiko caliber D138 is a digital watch movement. Production was in the 1980s.
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Sub-brands: Silverwave, Sports 100
Battery:SR1120W / 391 (Silver oxide)
Accuracy:±15 seconds/month
GMT / world time?No
Rate:32,768 Hz
Size / diameter:28.5mm x 27.0mm
Development division:Suwa (Nagano Prefecture, Japan)
Notes:Has an alarm.