Seiko 6139A
Mechanical
c. 1969
Self-winding (rotor)
Date
Day
Chronograph
No photos yet
Notes
1969-1972
sophisticated excenter self-winding mechanism with just one gear stage (Fig.4)
second and when announced smallest automatic chronograph
Dimensions
| Width | 27 lignes (60.91 mm) |
|---|---|
| Height | 7.2 mm |
| Stem height | — |
| Hands (H × M × S) | 1.5 × 0.9 × 0.26 mm |
Technical data
| Beat rate | 21,600 vph (3 Hz) |
|---|---|
| Lift angle | 54 ° |
| Power reserve | 45 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | Rotor |
|---|---|
| Date | Yes (quick set) |
| Day | Yes (quick set) |
| Hacking | No |
| Chronograph | Yes |
Mainspring
| GR code | GR25341-X |
|---|---|
| Height | 1.05 mm |
| Thickness | 0.12 mm |
| Length | 410 mm |
| Barrel diameter | — |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Seiko |
| Year | c. 1969 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions