MST 242
Description
1925, MST lauchned their caliber series 202, to which from 1933 on, the caliber MST 242 belonged, a 10 1/2 ligne windup movement.
It still has got the “LTG” hallmark, which stands for “L.Tieche Gammeter”, a watchmaker from Solothurn, which registered the brand “Roamer” a fews years before and merged in 1917 with Meyer & Stüdeli (MST).
base plate
With 15 jewels, this movement resembled the standards of a “good” pallet lever movement from the 1930s.
gear train
We have the classical gear train here, well made with fine executed gears. It consists of the center minute wheel, third wheel, seconds wheel at 6 o’clock and the steel escape wheel.
side view of the gear train
The two leg screw balance controls a pallet lever escapement and beats with 18000 A/h. They can be regulated with a long regulator arm.
A shock protection is not available, since it was no standard at that time.
MST 242: Dial side
On the dial side, you can see the filigree setting lever spring, which makes the identification of the movement easy.
Technical data
| Manufacturer: | MST |
| Caliber: | 242 |
| Caliber base: | MST 202 |
| Size: | 10 1/2''' (measured: 23,3mm) |
| A/h: | 18000 |
| Number of jewels: | 15 |
| Escapement: | Pallet lever |
| Balance types: |
monometallic screw balance (two legs) |
| Shock protection(s): |
none |
| Balance bearing / direction hairspring: | Clockwise |
| Moveable stud: | no |
| Adjust mechanism: | Long regulator arm |
| Construction: |
|
| Construction type: | solid construction |
| Winding mechanism: | yoke winding system |
| Setting lever spring: | 2 hole(s) |
| Features: |
|
| References: |
Ebauches: 1949 II 86 Feilner: 18 635 Flume: 1942 123 220 |
| Inventory number: | 220262 |
Usage gallery
Arrow ladies' watch