19 1/2”’ | Hand Wind | Pin Lever | Small Seconds |

Remarks:

• Rocking bar winding
• Click on the dial side
• The movement was built over a long period of time:
  • 1923 – 1945 by Thiel as caliber ‘Regular’
  • 1946 – 1952 under Soviet management
  • 1952 – 1990 by Ruhla UMF as UMF 1, 1968 renamed into UMF 83

• Listing ID: 11060
• Manufacturer / Brand: Ruhla UMF
• Caliber: 1 / M1
• Size in French Lignes: 19 1/2''' (18''' according to the manufacturer)
• Size range mm largest diameter: > 40 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Small seconds
• Escapement: Pin Lever
• Date, Day, Month...: None
• Jewels: 0
• Setting Lever Screw/Pin Position: Left
• Balance Position: Left (240 - 360°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Nickel
• Power Reserve: Approx. 30 hours
• Production Period: 1923-1990 (see remarks)
• Identification: Movement marked with UMF 1.
• Country: Germany
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)