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Unitas 521
Ligne: 10.5'''
Jewels: 2
Power Reserve: 31 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: ~1940
Diameter: 23.75 mm
Height: 4.2 mm
Hands: 1.35 x 0.70 / 0.21 mm
The Unitas 521 watch movement is equipped with a cylinder escapement. It features a ratchet mechanism located on the dial side and a crown mechanism with a rocker bar. The movement functions include manual wind, sub second, and it was commonly used around the period of approximately 1940.
The Unitas 521 features the following functions:
- Manual Winding
- Sub Second
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
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Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.40 x 0.130 x 270 x 10.0 mm | Manual | Buy mainspring | |
| 1.40 x 0.130 x 280 x 9.5 mm | GR3747 | Manual | 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
| Part Description | Reference # | Alternate | Buy |
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