This is an early AS (Adolph Schild) movement, which was already equipped with an anchor escapement, while the bridges and dial screws still remind of an cylinder movement.
On the dial side, there are still the old AS- and the Ebauches Trust marks. Probably this movement was released under the Ebauches Trust roof.
The movement didn't use a shock protection, but has got a long regulator arm, which ends on a very detailed scale. The bearing jewels are located in chatons, on the visible side, and the anchor wheel bridge is very helpful for service works.
Altogether, this is a very pleasing movement, technically as well as optically.