Seiko 5B21 Movement Details
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| Sub-brands: | Brightz |
| Battery: | SR927SW / 395 (Silver oxide) |
| Accuracy: | ±15 seconds/month |
| Day / date? | No |
| GMT / world time? | No |
| Chronograph? | No |
| Rate: | 32,768 Hz |
| Number of jewels: | 10 |
| PDF guides: |
