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 |