Omega 510-1240, Third wheel

• 
  Fits cal: 510, 511

Data: Omega 511 (25 PC AM sans seconde 17 p).

• 
  17 jewels, manual wind, hour and minute display.
• 
  Size: 25.00 mm.
• 
  H: = 3.25 mm.
• 
  N: = 19 800 A/h.
• 
  Power reserve: 42 h.

Versions:

• 
  510: Sub second (1956).
• 
  511: No second (1956).
• 
  520: Center second (1957).