6 3/4 x 8”’ | Hand Wind | Swiss Lever | No Seconds |

Remarks:

• Movement family:
  • MST 340: straight edges on the left and right, fixed hairspring stud-holder
  • MST 381: rounded edges on the left and right, fixed hairspring stud-holder
  • MST 396: rounded edges on the left and right, different balance cock with movable hairspring stud-holder

• Listing ID: 10281
• Manufacturer / Brand: MST / Roamer
• Caliber: 381
• Size in French Lignes: 6 3/4 x 8'''
• Size range mm largest diameter: 0 - 22 mm
• Shape: Form
• 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: Right (0 - 120°)
• Shock Protection: Incabloc
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: Approx. 35 hours
• Production Period: Unknown, probably around 1947
• Identification: Dial side marked with MST 381. Listed in the Flume K1 catalog in the part from 1947. Original datasheet available.
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)