ETA 728
Mechanical
No photos yet
Notes
several bridge layouts (cf. examples)
differences not known between 717-719, 724, 726-729,
likely just catalogue designations for the varying bridge layoouts
725 with indirect sweep second
Dimensions
| Width | — |
|---|---|
| Height | 3.6 mm |
| Stem height | 0.5 mm |
| Hands (H × M × S) | 1.2 × 0.65 × 0.21 mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 43 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | No |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | GR3311 |
|---|---|
| Height | 1.3 mm |
| Thickness | 0.12 mm |
| Length | 320 mm |
| Barrel diameter | 10 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | ETA |
| Year | — |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions