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

Remarks:

• Technically identical movements with different bridge shapes (see extra picture)
  • AM 280
  • AM 281
  • AM 420
  • AM 421
  • AM 422
  • AM 423
  • AM 424
  • AM 425
  • AM 426
  • AM 427
  • AM 428
  • AM 430
  • AM 431
  • AM 432

• Listing ID: 21306
• Manufacturer / Brand: AM
• Caliber: 432
• 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: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 15
• Setting Lever Screw/Pin Position: Right
• Balance Position: Bottom (120 - 240°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Screw balance
• Power Reserve: Approx. 38 hours
• Production Period: Unknown, probably around 1928+
• Country: Switzerland
• Identification: Movement marked with AM and Ebauches SA trust logo (TR). Listed in the Ebauches SA catalog from 1928.
• Contributor ©: Anonymous