Seiko 1B21 Movement Details
Seiko caliber 1B21 is an analog solar radio-controlled watch movement. Production was in the 2020s.
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| Accuracy: | ±15 seconds/month |
| Day / date? | No |
| GMT / world time? | No |
| Chronograph? | No |
| Rate: | 32,768 Hz |
| Notes: | Used in ladies watches. |
| PDF guides: | |
| Related movements: | 1B22 1B32 |