5 1/2”’ | Hand Wind | Swiss Lever | No Seconds |

Remarks:

• Movement family:
  • Omega 640: backwinder
  • Omega 650: normal winding

• Listing ID: 12951
• Manufacturer / Brand: Omega
• Caliber: 650
• Size in French Lignes: 5 1/2'''
• Size range mm largest diameter: 0 - 22 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: None
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 17
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Incabloc
• Beats per hour: 19,800
• Balance Type: Gold-plated Nickel?
• Power Reserve: Unknown
• Production Period: 1962+ (210,000 pieces)
• Country: Switzerland
• Identification: Movement marked with OMEGA and 650. Original datasheet from 1964 available.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)