Bulova 7AK (ETA 735)
Mechanical
c. 1936
No photos yet
Notes
1936-1949
Breguet hairspring
option: cover plate and raised hands for strongly curved dial (cf. Bulova 7AP)
only partially based on ETA 735
differences not known between 7AA, 7AH, 7AK
Dimensions
| Width | 17.55 lignes (39.59 mm) |
|---|---|
| Height | 3.55 mm |
| Stem height | 0.6 mm |
| Hands (H × M × S) | 1.25 × 0.6 × 0.22 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 | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | Zf873 |
|---|---|
| Height | 10 mm |
| Thickness | 0.11 mm |
| Length | 320 mm |
| Barrel diameter | 1.3 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Bulova |
| Year | c. 1936 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions