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Certina 20-10
Jewels: 17
Power Reserve: 34 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: 1895-1899
Diameter: 43.1 mm
Height: 6.65 mm
Hands: 1.65 x 0.92 / 0.25 mm
The Certina 20-10 is a mechanical watch movement that was produced between 1895 and 1899, with a total of 9100 units manufactured during that period. This open face calibre, known as model 7, features a bimetallic screw balance and a Breguet hairspring, ensuring precise timekeeping. It incorporates a negative stem mechanism which allows for easy switching between winding and setting the time. Additional functions of the Certina 20-10 include stem wind, which can be switched using either the crown or the lever, as well as a sub-second display.
The Certina 20-10 features the following functions:
- Stem wind
- Sub Second
- Switching by crown or lever
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 2.60 x 0.205 x 540 x 17.0 mm | GR6806DBH | DBH | 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) |
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Documents
Parts Listing
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