11 1/2”’ | Hand Wind | Swiss Lever | Direct Sweeping Seconds | Date |

Remarks:

• Date quick setting by repeatedly changing 20:40 – 24 o’clock
• Movement family:
  • AHO 1166
  • AHO 1166A: modified winding mechanism, e. g. setting lever spring (compare e. g. AHO 1021 and AHO 1021A)

• Listing ID: 20430
• Manufacturer / Brand: AHO
• Caliber: 1166A
• Size in French Lignes: 11 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...: Date
• Jewels: 17, 21
• Setting Lever Screw/Pin Position: Right
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Incabloc
• Beats per hour: 18,000
• Balance Type: Gold-plated nickel
• Power Reserve: Approx. 40 hours
• Production Period: Unknown, AHO 1166 without suffix A probably around 1960
• Country: Germany
• Identification: Movement marked with AHO 1166A on the dial side. AHO 1166 listed in the 1960 addendum to the Flume K1 catalog, AHO 1166A in the Flume K2 catalog from 1962.
• Contributor ©: Anonymous