Longines 19.71N
Example movement: Serial number: 5 162 773, manufactured in aprox: 1930.
Technical data Longines cal: 19.71N, Open face.
- 16 jewels, stem wind, hour, minute, sub second.
- Size: 19''' 41.9 mm.
- H: = 6.60 mm.
- N: = 18.000 A/h.
- Power reserve: 40 h.
- Mainspring: 2.40 x 16,5 - 0,19 - 520 BA Double brace
Versions:
- 15 Jewels.
- 16 Jewels with patent regulator.