Seiko H557 Movement Details
Seiko caliber H557 is an analog + digital ("ana-digi") watch movement. Production was in the 1980s.
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| Sub-brands: | Silverwave, Sports 100 |
| Battery: | SR920W / 370 (Silver oxide) |
| Accuracy: | ±10 seconds/month |
| Day / date? | Day + date |
| GMT / world time? | Yes |
| Chronograph? | Yes |
| Alarm? | Yes |
| Rate: | 32,768 Hz |
| Number of jewels: | 3 |
| Size / diameter: | 23.6mm x 26.0mm |
| Height: | 2.9mm |
| Notes: | Has an alarm and battery life indicator. The same as cal. H556 but with different shaped LCD display. |
| PDF guides: | Technical guide : H556A & H557A |
| Related movements: | H556 H558 |