10 1/2”’ | Hand Wind | Swiss Lever | Indirect Sweeping Seconds |

Remarks:

• KIF Duofix settings for escape wheel
• Movement family:
  • Rolex 1200: 18,000 bph, small seconds
  • Rolex 1210: 18,000 bph, indirect sweeping seconds
  • Rolex 1215: 18,000 bph, indirect sweeping seconds, date
  • Rolex 1220: 21,600 bph, indirect sweeping seconds
  • Rolex 1225: 21,600 bph, indirect sweeping seconds, date

• Listing ID: 10125
• Manufacturer / Brand: Rolex
• Caliber: 1220
• Size in French Lignes: 10 1/2'''
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 17
• Setting Lever Screw/Pin Position: Right
• Balance Position: Bottom (120 - 240°)
• Shock Protection: KIF Ultraflex
• Beats per hour: 21,600
• Balance Type: Glucydur
• Power Reserve: 58 hours
• Production Period: Unknown, probably around 1972
• Identification: Movement marked with ROLEX and 1225 (all 1220 are marked 1225!). Listed in the Flume K3 catalog from 1972.
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)