18”’ | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

• Rare Savonnette (hunter) version of the caliber 40.6. 959,400 of the caliber 40.6 were produced between 1923 and 1936, but only 54,600 of them in the Savonnette version
• In the Flume K1 catalog, the caliber 40.6 is only listed as a Lépine (open face) version. In the Classification Horlogère of 1936, the Savonnette version is listed, but only the Lépine is illustrated
• Caliber designation 40.6S.T2.15P stands for:
  • Diameter 40.6 mm
  • S = Savonette (hunter)
  • T2 = Transformation 2 (i.e. the second change to the original caliber)
  • 15P = 15 pierres, i.e. 15 jewels

• Listing ID: 5149
• Manufacturer / Brand: Omega
• Caliber: 40,6 S T2 15P
• Size in French Lignes: 18''', height 5.8 mm
• Size range mm largest diameter: > 40 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: None
• Beats per hour: 18,000
• Balance Type: Bimetallic screw balance with Breguet hairspring
• Power Reserve: Approx. 30 hours
• Production Period: 1923 - 1936 (according to the Omega Museum Caliber list
• Country: Switzerland
• Identification: Movement marked 40.6S.T2.15P under the balance. Listed in the Classification Horlogère from 1936.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/#post-1117098