Certina 17-221
Mechanical
Self-winding (rotor)
Date
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Notes
rotor ball-bearing with 7 ruby balls, if 32 jewels (cf. Certine 15-21)
Dimensions
| Width | 17.2 lignes (38.8 mm) |
|---|---|
| Height | 5.1 mm |
| Stem height | — |
| 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 | Yes |
| 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 | — |
| Family | — |
| Clone of | — |
Related calibers
Documents
None
Updated 7 days ago · 0 revisions