Certina 15-21
Mechanical
c. 1964
Self-winding (rotor)
No photos yet
Notes
1964-
rotor ball-bearing with 7 ruby balls (Fig.4)
Dimensions
| Width | 15.3 lignes (34.51 mm) |
|---|---|
| Height | 4.7 mm |
| Stem height | 0.9 mm |
| Hands (H × M × S) | 1 × 0.55 × ? mm |
Technical data
| Beat rate | 21,600 vph (3 Hz) |
|---|---|
| Lift angle | 51 ° |
| Power reserve | 39 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | Rotor |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | — |
|---|---|
| Height | 6 mm |
| Thickness | 0.07 mm |
| Length | — |
| Barrel diameter | 1.2 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Certina |
| Year | c. 1964 |
| Family | — |
| Clone of | — |
Related calibers
Documents
None
Updated 7 days ago · 0 revisions