17 1/2”’ | Hand Wind | Cylinder | Small Seconds |

Remarks:

• Rocking bar winding
• Click on the dial side
• Movement family with different bridge shapes (see extra pictur):
  • AM 150
  • AM 153
  • AM 154

• Listing ID: 21301
• Manufacturer / Brand: AM
• Caliber: 154
• Size in French Lignes: 17 1/2'''
• Size range mm largest diameter: 31 - 40 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Small seconds
• Escapement: Cylinder
• Date, Day, Month...: None
• Jewels: 8
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Brass
• Power Reserve: Unknown, probably around 1928
• Production Period: Approx. 30 hours
• Country: Switzerland
• Identification: Movement listed in the Ebauches SA catalog from 1928.
• Contributor ©: Anonymous