Longines 503-2558, Hour wheel

• NOS LONGINES original part in factory sealed packaging.

• Fits cal: 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.