When exactly the AS 568 was available, is unclear, but it might have been the 1930ies, since on the dial side, the Ebauches Trust hallmark is used.
It is a contemporary cylinder movement with a diameter of 10 1⁄2 lignes, which was suitable for the upcoming popular, still rather small, wristwatches.
As you would expect from AS, all critical bearings contain rubies.
You also see, that it is massively constructed, since the gears each have different engraving depths in the base plate.
The AS 568 uses the standard gear train for a cylinder movement: Mainspring barrel, directly driven center minute wheel, third wheel, fourth wheel and finally the cylinder wheel.
The cylinder wheel with its sharp teeth always interferes with the balance, more precisely with its cylinder. It’s easy to understand, that the resulting fraction impacts the accurancy.
The flat anular balance beats with 18000 A/h, which can be adjusted with a long regulator arm and scale. Of course, the balance wheel is not yet shock protected.
The AS 568, which uses the old AS hallmark and additionally the Ebauches Trust hallmark on the dial side, has got a very modern yoke winding system, whose ratchet sits on the movement side.
The complete balance system including cock and both bearings are made as a detachable unit for servicing. You see this on the bottom of the dial side.
|Number of jewels:||10|
Nickel anular balance|
|Balance bearing / direction hairspring:||Counterclockwise|
|Adjust mechanism:||Long regulator arm|
|Construction type:||solid construction|
|Winding mechanism:||yoke winding system|
|Setting lever spring:||1 hole(s)|
|Size:||10 1/2''' (measured: 23,3mm)|