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 |
| Alarm? | Yes |
| Rate: | 32,768 Hz |
| Size / diameter: | 26.0mm |
| Height: | 4.8mm |
| Development division: | Daini (Kameido, Tokyo, Japan) |
| PDF guides: |
Battery replacement guide
: M421A
Technical guide |
| Related movements: | M422 |