Longines 501-963, Winding stem, split-outher
- LONGINES original part, not in factory packaging.
- Male outher winding stem, length: 550, thread: 0,90 mm.
- Fits cal: 501, 503, 505, 506, 507, 508
Versions: 19800 A/h:
- 501: date.
- 503: day, date.
- 505: quickset date.
- 507: day, quickset date.
Versions: 21600 A/h, micrometer regulator:
- 506: quickset date.
- 508: day, quickset date.