Hamilton 721
Mechanical
c. 1939
No photos yet
Notes
1939-1949, 397447
Breguet hairspring
Dimensions
| Width | — |
|---|---|
| Height | 3.25 mm |
| Stem height | 0.4 mm |
| Hands (H × M × S) | 1 × 0.5 × ? mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 36 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | No |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | — |
|---|---|
| Height | — |
| Thickness | — |
| Length | — |
| Barrel diameter | — |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Hamilton |
| Year | c. 1939 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions