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

Remarks:

• Produced by different manufacturers and with different caliber designations over time:
  • Thiel Präzisa: small seconds, 2 holes at 6H, no shock protection
  • Ruhla UMF Präzisa, Ruhla UMF 2: small seconds, 2 holes at 6H, no shock protection
  • Ruhla UMF 29-80: small seconds, 1 hole at 6H, no shock protection
  • Ruhla UMF 29-10: no seconds, 1 hole at 6H, no shock protection
  • Ruhla UMF 29-11: small second, 1 hole at 6H mostly with shock protection
  • Ruhla UMF 29-12, Ruhla UMF 2c: indirect sweepinbg seconds, 1 hole at 6H, shock protection

• Listing ID: 11065
• Manufacturer / Brand: Ruhla UMF
• Caliber: 2 / M2
• 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: 15
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Antichoc 102
• Beats per hour: 18,000
• Balance Type: Nickel
• Power Reserve: Approx. 40 hours
• Production Period: 1948-1963 (including predecessors Thiel/UMF Präzisa)
• Country: Germany
• Identification: Dial side marked with UMF 2. Listed in the Flume 1 catalog in the part from 1952 as Thiel 2.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)