Omega 491
Mechanical
c. 1955
Self-winding (rotor)
No photos yet
Notes
1955-1960
family 470, 490, 500 totally 1075000
detached manual wind
Dimensions
| Width | 28 lignes (63.16 mm) |
|---|---|
| Height | 5.55 mm |
| Stem height | 1.2 mm |
| Hands (H × M × S) | 1.5 × 0.8 × ? mm |
Technical data
| Beat rate | 19,800 vph (2.75 Hz) |
|---|---|
| Lift angle | 49 ° |
| Power reserve | 46 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | Rotor |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | GR2922-X |
|---|---|
| Height | 1.2 mm |
| Thickness | 0.1 mm |
| Length | 340 mm |
| Barrel diameter | 10 mm |