Certina 28-15
Mechanical
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Notes
Girocap combined settings for escapement wheel
after 1957 ring balance and mobile stud carrier
Dimensions
| Width | 28 lignes (63.16 mm) |
|---|---|
| Height | 4.4 mm |
| Stem height | 1.3 mm |
| Hands (H × M × S) | 1.5 × 0.9 × 0.18 mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | 48 ° |
| Power reserve | 46 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | No |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | GR3717 |
|---|---|
| Height | 1.4 mm |
| Thickness | 0.12 mm |
| Length | 360 mm |
| Barrel diameter | 10.5 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Certina |
| Year | — |
| Family | — |
| Clone of | — |
Related calibers
Documents
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Updated 7 days ago · 0 revisions