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MST 389

 
MST 389 |

MST 389

Description

Even in tiny ladies’ watches there can be very good movements. An example is Roamer, who put into a very small watch of only 17.5mm diameter this nicely executed caliber MST 389.

It measures only 15.6 x 12.8mm (~ 7 x 5 3/4 lignes), but contains many high quality parts: a large glucydur balance, an Incabloc shock protection, an adjustable hairspring stud and a regulator with a hand. The main plate contains golden beared jewels and the anchor wheel even runs in a Diafix jewel setting.

Technical data

Manufacturer:MST
Caliber:389
Size:5 3/4 x 7'''
A/h:18000
lift angle:52°
Number of jewels:17
Escapement:Pallet lever
Balance types:Glucydur anular balance
Shock protection(s):Incabloc
Balance bearing / direction hairspring:Counterclockwise
Moveable stud:yes
Adjust mechanism:Long regulator arm
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel, center minute wheel
  • mainspring barrel
Data sheet:1966
Hint: The jewel count, the types of balances used, and the shock protections employed refer only to the specimens held in the archive and are therefore not relevant for the precise identification of the movement.

Usage gallery

MST 389: Roamer ladies' watch

Roamer ladies' watch

Other movements from MST