Junghans 620.57
Mechanical
c. 1971
Date
No photos yet
Notes
1971-1975
barrel with two jewel bearings
Dimensions
| Width | 25.6 lignes (57.75 mm) |
|---|---|
| Height | 3.75 mm |
| Stem height | 1.2 mm |
| Hands (H × M × S) | 1.5 × 0.9 × 0.21 mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 47 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | No |
|---|---|
| Date | Yes |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | Zf607 |
|---|---|
| Height | 10.5 mm |
| Thickness | 0.12 mm |
| Length | 320 mm |
| Barrel diameter | 1.15 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Junghans |
| Year | c. 1971 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions