12 1/4”’ | Hand Wind | Swiss Lever | Sweeping Seconds |

Remarks:

• Pillar construction

• Listing ID: 4408
• Manufacturer / Brand: Sonceboz / Voumard
• Caliber: Sonceboz ES 50 = Voumard 1050
• Size in French Lignes: 12 1/4'''
• 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...: None
• Jewels: 17
• Setting Lever Screw/Pin Position: Left
• Balance Position: Left (240 - 360°)
• Shock Protection: Incabloc
• Beats per hour: 18,000
• Balance Type: Glucydur?
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1975
• Identification: Inscription on the dial side with ES 50 (ES = Ebauches Sonceboz). The same movement is also available with the inscription Voumard 1050.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-11#post-2221744
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)