MST 346 
Ligne8.75 x 11.75'''
Cal. 327

Remarks: Large barrel movement for use in rectangular watches. Watches with this calibre are of quite wearable size. This calibre is a vastly higher quality replacement for the MST 321, 322 calibres. No form of shock protection is listed in the factory manual, however one sample has come to light with single axis shock protection in a sturdy retangular case with gaskets.
 
Production period: 1940s

Jewels: 17
Beat: 18000
Winding: manual
Manufacturer: MST
Hand sizes:
Hour:130
Minute: 60
Second: 19
  
Stem tap size: 90

Variant:
MST 346 8.75 x 11.75''' (19.90 x 26.40mm) large rectangular, sub second

Common parts/Interchange
Balance Staff:
MST part number:7425,  interchanges with MST: nil
Mainspring:
MST part number:1224 interchanges with MST: nil
Strength: 1.100
Height: 1.20
Length: 280

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