5 3/4 x 8 1/2”’ | Hand Wind | Swiss Lever | No Seconds |

Remarks:

• Rocking bar winding
• Click on the dial side
• Movement family:
  • Osco 53: pillar construction
  • Osco 60: pillar construction, differences to 53 unknown
  • Osco 70: massive bridges

• Listing ID: 10189
• Manufacturer / Brand: Osco
• Caliber: 53
• Size in French Lignes: 5 3/4 x 8 1/2'''
• Size range mm largest diameter: 0 - 22 mm
• Shape: Form
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: None
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 17
• Setting Lever Screw/Pin Position: Left
• Balance Position: Left (240 - 360°)
• Shock Protection: Monorex
• Beats per hour: 18,000
• Balance Type: Nickel
• Power Reserve: Approx. 36 hours
• Production Period: Unknown, probably around 1957
• Country: Germany
• Identification: Bridge side marked with Osco logo and 53. Listed in the Flume K1 catalog in the part from 1957.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)