LONGINES 501 - 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.