MST 351,  352,  352sc,  364,  364sc,  400,  401 
Ligne10.5''' 10.5''' 10.5''' 11.5''' 11.5''' 10.5''' 11.5'''
Cal. 352 Cal. 400 (late 60s)

Remarks: Same base movement shared between 351, 352, 364, 400 and 401. A very long lived calibre design, with many variations, including being the basis for the 416 Calendar movement (listed separately). Differences in bridge shapes and design, fine finishing, seconds, and ligne the only significant differences. Models optionally fitted with a large variety of shock protection, including parachoc, shock-resist (SR), super-shock-resist (SSR) and finally (40x only) incabloc (SSR II).
 
Production period: late 1930s to late 1940s (for 300 cals), and late 1940s to late 1960s (for 400 cals)

Jewels: 15 or 17
Beat: 18000
Winding: manual
Manufacturer: MST
Hand sizes:
Hour:150
Minute: 80
Second: 19
  
Stem tap size: 90

Variant:
MST 351 10.5''' (23.40mm) sub-second, seperate escape cock
MST 352 10.5''' (23.40mm) sub-second, 3 finger bridge
MST 352sc 10.5''' (23.40mm) indirect centre second, 3 finger bridge
MST 364 11.5''' (25.50mm) sub-second, 3 finger bridge
MST 364sc 11.5''' (25.50mm) indirect centre second, 3 finger bridge
MST 400 10.5''' (23.40mm) sub-second, single train bridge
MST 401 11.5''' (25.50mm) sub-second, single train bridge

Common parts/Interchange
Multiple balance staffs possible:
MST part number:7440,  interchanges with MST: 351, 352, 364, 400, 401
MST part number:7441 (SR + SSR),  interchanges with MST: 352, 364
MST part number:7475 (inca),  interchanges with MST: 352, 364, 400, 401, 416
MST part number:7518 (inca II),  interchanges with MST: 400, 401
Mainspring:
MST part number:1213 interchanges with MST: 351, 352, 360,364, 371, 372, 400, 401, 416
Strength: 0.1025
Height: 155
Length: 300
Watches in my collection with the MST352:
Watches in my collection with the MST364:

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