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Unitas 521
Ligne: 6.75 x 8'''
Jewels: 17
Power Reserve: 39 hrs
Frequency: 31600 vph
Type: Manual Wind
Period used: ~1975
Size: 15.35 x 18.2 mm
Height: 3.5 mm
Hands: 1.20 x 0.60 mm
The Unitas 521 watch movement is a mechanical movement with manual winding capability. It is not known what specific differences exist between this movement and the 80, 81, and 82 models. In addition to the manual winding feature, there is also an option for a digital display. The Unitas 521 movement was utilized in watches during approximately the year 1975.
The Unitas 521 features the following functions:
- Manual Winding
- Option: Digital display
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|---|---|
| 4181 | Ordinary/None | Buy staff |
| 4181 | Incabloc | Buy staff |
| 4181 | Monorex | Buy staff |
| 4181 | Rubyshock | Buy staff |
| 4181 | Shockproof | Buy staff |
| 4181 | Unishock | Buy staff |
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.60 x 0.080 x 240 x 7.0 mm | GR4445 | 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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