Eterna 51
Mechanical
c. 1898
No photos yet
Notes
1898-1918
open face calibre
bimetallic screw balance with 4 adjustment screws
watch and alarm driven by a single barrel
alarm wheel with setting hand beared in dial (Fig.3)
ratchet on dial side, crown mechanism with singke-arm rocker bar
Dimensions
| Width | 44.65 lignes (100.72 mm) |
|---|---|
| Height | 8.15 mm |
| Stem height | 0.9 mm |
| Hands (H × M × S) | 1.9 × 1.2 × 0.3 mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 30 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | No |
|---|---|
| Date | No |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | GR6710 |
|---|---|
| Height | 2.5 mm |
| Thickness | 0.2 mm |
| Length | 680 mm |
| Barrel diameter | 18.5 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Eterna |
| Year | c. 1898 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions