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

Remarks:

• Rocking bar winding
• Click on the dial side
• Movement family:
  • Osco 55: 15 jewels
  • Osco 56: 17 jewels

• Listing ID: 19662
• Manufacturer / Brand: Osco
• Caliber: 56
• 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: 17
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Rufarex
• Beats per hour: 18,000
• Balance Type: Gold plated nickel?
• Power Reserve: Approx. 32 hours
• Production Period: Unknown, probably around 1957
• Country: Germany
• Identification: Movement listed in the Flume K1 in the part from 1957.
• Contributor ©: Anonymous