Seiko 7N21 Movement Details
Seiko caliber 7N21 is an analog quartz watch movement. Production was in the 1990s.
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| Sub-brands: | SUS, Lucent |
| Battery: | SR920SW / 371 (Silver oxide) |
| Accuracy: | ±15 seconds/month |
| Day / date? | No |
| GMT / world time? | No |
| Chronograph? | No |
| Rate: | 32,768 Hz |
| PDF guides: | |
| Related movements: | 7N22 |