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Seiko 5641A
Ligne: 11.5'''
Jewels: 25
Power Reserve: 44 hrs
Frequency: 21600 vph
Type: Automatic
Period used: ~1970
Diameter: 26 mm
Hands: 1.50 x 0.90 x 0.21 mm
The Seiko 5641A is a mechanical watch movement that features an excenter winding mechanism. It incorporates various functions including automatic winding, sweep seconds, day indication, and a date display that can be adjusted by changing the time to the 20:30-24h position. It also includes an adjustable stud holder and shock protection for improved durability. The Seiko 5641A movement was commonly used around the 1970s.
The Seiko 5641A features the following functions:
- Adjustable Stud Holder
- Automatic Winding
- Calendar
- Date: set by changing 20:30-24h
- Day
- Shock Protection
- Sweep second
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.20 x 0.100 x 9.5 mm | Auto | Buy mainspring |
Incabloc Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
|---|
KIF Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
|---|
Documents
Parts Listing
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