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Unitas 451
Jewels: 17
Power Reserve: 33 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: 1889-1897
Diameter: 45.75 mm
Height: 10.1 mm
Hands: 2.46 x 1.27 / 0.30 mm
The Unitas 451 watch movement, produced from 1889 to 1897 with a total of 28,000 units, is an open face calibre, model 5. It features a bimetallic screw balance, a Breguet hairspring, and a regulator with a nut on the thread bow. Notably, the ratchet is positioned under the base plate, and it incorporates a negative stem mechanism with a rocker bar. The movement includes functions such as stem winding, which can be switched by the crown or lever, as well as a sub-second hand.
The Unitas 451 features the following functions:
- Stem wind, switching by crown or lever
- Sub Second
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 2.92 x 0.222 x 570 x 17.5 mm | Manual | 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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