Bulova 12EBA (Buren 1280)
Mechanical
c. 1965
Self-winding (rotor)
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Notes
1965-
micro rotor, double jewel bearing if 30 jewels
double excenter regulator for curb pins and stud carrier
selfwinding gear with direction switching by a pinion floating between two huge jewels (Fig.3)
indirectly driven minute allows a low profile
(details cf. Buren 1320)
since 1966/67 minor modifications of base plate (cf. Bulova 12EBACD)
Dimensions
| Width | 28.15 lignes (63.5 mm) |
|---|---|
| Height | 2.85 mm |
| Stem height | 1.1 mm |
| Hands (H × M × S) | 1.4 × 0.8 × ? mm |
Technical data
| Beat rate | 19,800 vph (2.75 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 54 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | Rotor |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | — |
|---|---|
| Height | 9.5 mm |
| Thickness | 0.1 mm |
| Length | — |
| Barrel diameter | 1 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Bulova |
| Year | c. 1965 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions