MST 410,  411 
Ligne12''' 12'''
Cal. 411

Remarks: Meyer and Stuedeli SA (MST) first in-house automatic. A very important movement for MST. Features innovative and efficient bidirectional rotor winding, and decoupling of manual and automatic winding mechanisms the subject of 2 new patents with elements carried though to later movements.
 
Production period: 1949-1956

Jewels: 17
Beat: 18000
Winding: automatic
Manufacturer: MST
Hand sizes:
Hour:150
Minute: 80
Second: 19
  
Stem tap size: 90

Variant:
MST 410 12''' (26mm) sub seconds at 6
MST 411 12''' (26mm) indirect sweep seconds

Common parts/Interchange
Multiple balance staffs possible:
MST part number:7430,  interchanges with MST: 367, 410, 411, 422
MST part number:7431 (inca),  interchanges with MST: 367, 410, 411, 422
Multiple mainsprings possible:
MST part number:1268 for barrel diameter 894mm interchanges with MST: 410, 411
Strength: 0.0825
Height: 1.30
Length: 240
MST part number:1277 for barrel diameter 952mm interchanges with MST: 410, 411
Strength: 0.0825
Height: 1.30
Length: 255
Associated Patents:
CH272613Bi-directional full rotor winding with small lost angle
Deposited 1948, granted 1950
CH274012Decoupling of manual and automatic winding mechanisms
Deposited 1948, granted 1951

All text and images are either © Kris Bubendorfer 2011-15 or © Roamer Watch Company.