12 1/2”’ | Automatic | Swiss Lever | Indirect Sweeping Seconds |

Remarks:

• Movement family:
  • 18,000 bph
    • Rolex 1530: no date
    • Rolex 1535: date
    • Rolex 1555: date, day
    • Rolex 1560: no date, several new parts, e. g. automatic module
    • Rolex 1565: date, several new parts, e. g. automatic module
    • Rolex 1565 GMT: date, GMT, several new parts, e. g. automatic module
  • 19,800 bph
    • Rolex 1520: no date
    • Rolex 1525: date
    • Rolex 1556: date, day
    • Rolex 1570: no date, several new parts, e. g. automatic module
    • Rolex 1575: date, several new parts, e. g. automatic module
    • Rolex 1575 GMT: date, GMT, several new parts, e. g. automatic module
    • Rolex 1580: no date, antimagnetic (Milgauss)

• Listing ID: 14401
• Manufacturer / Brand: Rolex
• Caliber: 1556
• Size in French Lignes: 12 1/2'''
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Automatic
• Hands Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: Date & Day
• Jewels: 26
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: KIF Elastor
• Beats per hour: 19,800
• Balance Type: Monometallic screw balance
• Power Reserve: Approx. 42 hours
• Production Period: Unknown, probably around 1965+
• Country: Switzerland
• Identification: Movement marked with ROLEX and 1556.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)