Girard-Perregaux 31.7
Mechanical
Self-winding (rotor)
No photos yet
Notes
1965
first movement with 36000 A/h
automatic with two roller freewheels
ball-bearing rotor
worm screw regulation gear
The family is based on the manual wind calibre AS 1687/1688.
The automatic mechanism is a joint development of Doxa, Eberhard, Favre-Leuba, Girard-Perregaux, and Zodiac.
differences not known between 31A, 31.7
Dimensions
| Width | 25.6 lignes (57.75 mm) |
|---|---|
| Height | 5 mm |
| Stem height | 1.1 mm |
| Hands (H × M × S) | 1.5 × 0.9 × 0.21 mm |
Technical data
| Beat rate | 36,000 vph (5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 40 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | Rotor |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | — |
|---|---|
| Height | 10 mm |
| Thickness | 0.11 mm |
| Length | — |
| Barrel diameter | 1.1 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Girard-Perregaux |
| Year | — |
| Family | — |
| Clone of | — |
Related calibers
Documents
None
Updated 7 days ago · 0 revisions