This movement was not marked, but could be identified by its functions (which say, that it is a 09 movement) and the Flume K3.
It is a common constructed movement with direct center second, Glucydur balance and russian shock protection sytem.
An older version, with the old Zaria markings, uses a Glucycur screw balance and an old Zaria shock protection system.
On the reworked version 1509B.1, the anchor is now located under a bridge.
Furthermore, there’s a version, where the moveable hairspring stud is secured by a screw and not only tightly held in place.
|Number of jewels:||15/17|
Glucydur screw balance|
Glucydur anular balance
3 arms, russian|
|Balance bearing / direction hairspring:||Clockwise|
|Adjust mechanism:||Long regulator arm / hairspring key|
|Winding mechanism:||yoke winding system|
|Setting lever spring:||2 hole(s)|
|Functions:||hour, minute, second|
|Size:||6 1/2 x 8'''|
Flume: K3 88|