MST 366

MST 366 | - The Movement Archive

MST 366


The MST caliber 366, which was used in Roamer watches is a ladies' form movement of decent quality. It uses seventeen jewels, a screw balance (not shock protected) and a regulator with a long arm.

The angeled plates, the stripe decoration and the indicated chatons add a very nice appearance, and this is something, which is not too common on those tiny ladies' form movements.

MST 366: MST 366 dial side

MST 366 dial side

Technical data

Size:5 3/4 x 6 3/4'''
Number of jewels:17
Escapement:Pallet lever
Balance types: Nickel screw balance
Shock protection(s): none
Balance bearing / direction hairspring:Counterclockwise
Moveable stud:no
Adjust mechanism:Long regulator arm
  • lever
  • escape wheel, seconds wheel, third wheel, center minute wheel
  • mainspring barrel
Winding mechanism:yoke winding system
Setting lever spring:3 hole(s)
References: Flume: 1949 II 85

Usage gallery

MST 366: Roamer ladies' watch  (dial only)

Roamer ladies' watch (dial only)