This difficult to identify, since nowhere marked Judex 122 is a 10 1/2 ligne pallet lever movement, which was made in France in the 1940s.
Construction-wise it has no oddities at all, which is almost a bit odd.
As you can see on the base plate, all important bearings contain rubies. Those of the minute wheel and mainspring barrel don’t need one, because they turn too slow and have enough torque, so there’s no real need for a friction- and war reducing ruby.
The gear train is textbook like: The mainspring barrel drives the center minute wheel, followed by third wheel, escape wheel at 6 o’clock (which carries the decentral seconds hand on the dial side) and steel escape wheel.
The two leg screw balance is not yet shock protected. It regularts a swiss type pallet lever movement and beats slowly with 18000 A/h. The adjustment happens on the hairspring key directly.
Also on the dial side, there’s the usual image: On the right the yoke winding system, on the left the cap jewel of the escapement wheel bearing and at 6 o’clock the axle of the seconds wheel, which carries the decentral seconds hand.
|Size:||10 1/2''' (measured: 23,2mm)|
|Number of jewels:||15|
Nickel screw balance (two legs)|
|Balance bearing / direction hairspring:||Clockwise|
|Adjust mechanism:||Hairspring key|
|Construction type:||solid construction|
|Winding mechanism:||yoke winding system|
|Setting lever spring:||2 hole(s)|
Flume: 1944 14|