7”’ | Hand Wind | Swiss Lever | No Seconds |

Remarks:

• Movement family
  • MST 431: Hand winding
  • MST 432: Automatic

• Listing ID: 13569
• Manufacturer / Brand: MST
• Caliber: 431
• Size in French Lignes: 7'''
• Size range mm largest diameter: 0 - 22 mm
• Shape: Round
• 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: Right
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Incabloc
• Beats per hour: 18,000
• Balance Type: Glucydur
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1961
• Country: Switzerland
• Identification: Dial side marked with MST 431. Original data sheet available. Listed in the Roamer spare parts catalog from 1961.
• Contributor ©: Uhrforum.de member buchenhain
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-72#post-10082230