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Certina 28-451
Ligne: 13.75'''
Jewels: 17/21/25
Lift Angle: 52°
Power Reserve: 42 hrs
Frequency: 21600 vph
Type: Automatic
Period used: ~1960
Diameter: 31 mm
Height: 5.25 mm
Hands: 1.50 x 0.90 x 0.21 mm
The Certina 28-451 watch movement, which was commonly used around 1960, features various functions such as automatic winding, a sweep second hand, and a ball-bearing rotor. This movement incorporates a indirectly driven minute hand mechanism, allowing for a larger balance and a lower profile. Additionally, the movement includes a day and date display, with the day indicated by a bow-aperture positioned between 11 o'clock and 1 o'clock, and the date adjusted by changing the time between 20:20 and 24:00.
The Certina 28-451 features the following functions:
- Automatic Winding
- Ball-bearing Rotor
- Date: set by changing 20:20-24h
- Day and Date Display
- Day: bow-aperture between 11h and 1h
- Sweep second
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.10 x 0.120 x 320 x 10.5 mm | Auto | Buy mainspring |
Incabloc Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) | |
|---|---|---|---|
| See More |
KIF Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) | |
|---|---|---|---|
| See More |
Documents
Parts Listing
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