Bulova 12B (Junghans 689.70 / J89)
Mechanical
c. 1951
No photos yet
Notes
1951-1958
especially made by Junghans for Bulova with 17 Jewels
common barrel for watch and alarm
ratchet on dial side, crown mechanism with rocker bar
Dimensions
| Width | — |
|---|---|
| Height | 6.4 mm |
| Stem height | — |
| Hands (H × M × S) | 2.2 × 1.41 × 0.79 mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | — |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | No |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | Zf1403 |
|---|---|
| Height | 11.5 mm |
| Thickness | 0.12 mm |
| Length | 385 mm |
| Barrel diameter | 1.7 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Bulova |
| Year | c. 1951 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions