Longines 21.54
Example movement: Serial number: 2 020 506, manufactured in aprox: 1900.
Technical data Longines cal: 21.54, Open face.
- 15 jewels, stem wind, lever set, hour, minute, sub second.
- Size: 21''' 44.6 mm.
- H: = 8.60 mm.
- N: = 18.000 A/h.
- Power reserve: -- h.
- Mainspring:
