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: |
|
Usage gallery
Roamer ladies' watch