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

Remarks:

• Movement family:
  • Osco 800: no date
  • Osco 850: date

• Listing ID: 11204
• Manufacturer / Brand: Osco
• Caliber: 850
• 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
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Incabloc
• Beats per hour: 18,000
• Balance Type: Glucydur
• Power Reserve: Approx. 48 hours
• Production Period: Unknown, probably around 1969
• Identification: Movement marked with OS 850 under the balance wheel. Listed in the Engelkemper catalog from 1969.
• Country: Germany
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)