Eterna 1249UC
Mechanical
c. 1950
Self-winding (rotor)
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Notes
1950-1954
first gents automatic-family with ball-bearing rotor (the very first in 1948 was a ladies size: 1194-1199)
The simultaneous change from T- to U shock device and to a modified calibre (suffix C) lead to many variants. It is unknown whether all calibres were made in the variant TC (old shock device, new calibre); so only the known are listed here. Even signatures of UT versions were changed to UC (cf. 1247UT).
detached manual wind: The self-winding gear is coupled to he crown wheel with a springless lever mechanism (Fig.4).
polished lever with all edges bevelled (Fig.4)
bidirectional self winding with only one ratchet wheel (Fig.5)
base plate decorated under bridges (Fig.6)
Dimensions
| Width | 29 lignes (65.42 mm) |
|---|---|
| Height | 5.9 mm |
| Stem height | 1.6 mm |
| Hands (H × M × S) | 1.5 × 0.9 × 0.21 mm |
Technical data
| Beat rate | 18,000 vph (2.5 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 42 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 | 1.5 mm |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Eterna |
| Year | c. 1950 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions