Long forgotten is the german ebauche manufacturer Tschudin (resp. Schätzle & Tschudin), who initially offered their movements under the brand “Favor”.
The Tschudin 250 is a form movement, whose execution already looks pretty modern, although it was already released in the late 1940ies.
All important bearings contain rubies, so that in total, 15 jewels are used - the contemporarily standard of better movements.
It is also visible, that the Tschudin 259 has got a pretty large mainspring barrel, but otherwise leaves lots if space unused. Probably this was one of the reasons, why that movement was not used very often.
We have the usual gear train: The mainspring barrel drives the center minute wheel directly, followed by the third wheel. The two following gears, the seconds wheel (at 6 o’clock) and the steel escape wheel are beared under an own cock, this is pretty unusual but simplifies the service.
The rather simple made screw balance with two legs is of course not yet shock protected. But her frequency of 18000 A/h can be regulated with the help of a long regulator arm.
As escapement system, the usual swiss pallet lever escapement is used.
On the dial side, you see the yoke winding system, which is expected on this kind of movement.
At 6 o’clock, there’s the bearing jewel for the decentral seconds hand indication, which was a very popular complication at that time.
|Number of jewels:||15|
Nickel screw balance|
|Balance bearing / direction hairspring:||Clockwise|
|Adjust mechanism:||Long regulator arm|
|Construction type:||solid construction|
|Winding mechanism:||yoke winding system|
|Setting lever spring:||2 hole(s)|
|Functions:||hour, minute, decentral second|
|Size:||6 3/4 x 8 3/4''' (measured: 15,0 x 19,0mm)|
Flume: 1947 130|