Eterna 52
Mechanical
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Notes
909-1931 (probably longer)
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
optins:
crown mechanism with set lever,
back crown for alarm setting
Dimensions
| Width | 41.2 lignes (92.94 mm) |
|---|---|
| Height | 7.3 mm |
| Stem height | 0.9 mm |
| Hands (H × M × S) | 1.9 × 1.2 × 0.35 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 | GR6420 |
|---|---|
| Height | 2.3 mm |
| Thickness | 0.19 mm |
| Length | 580 mm |
| Barrel diameter | 17 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Eterna |
| Year | — |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions