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Seiko 1M20-5A40
The Seiko 1M20-5A40 is an automatic watch movement equipped with a day and date display feature. It operates at a beat rate of 21600 vibrations per hour.
The Seiko 1M20-5A40 features the following functions:
- Automatic Winding
- Day and Date Display
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
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Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.45 x 0.125 x 400 x 11.0 mm | GR4006X | Auto | Buy mainspring |
Incabloc Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
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KIF Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
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Documents
Parts Listing
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