ETA 1256 - 1259
First automatic movement from ETA, manufactured 1950 - 1954.
Data: ETA cal: 1256
- 17/21/25 jewels, automatic wind, hour, minute, center second.
- Size: 11,5''' 25,60 mm.
- H: = 5,85 mm.
- N: = 18000.
- Power reserve: 40 h.
- Mainspring: 1,50 x 9.5 - 0.10 - 300 mm.
Versions:
- 1256: option: power reserve indicator, H=6,90 mm.
- 1257: minor modifications, (1950 - 1961).
- 1258: date, H=6,00 mm, (1953 - 1955).
- 1259: date, H=6,00 mm, (1955 - 1961), redesigned 1258.
