This old ETA cylinder movement has got a diameter of 19,1mm.
Thanks to JackDaniels of the german UhrForum, it could be found on the Paulson movement finder of 1950 and identified as ETA 583.
On the base plate, you see, that there are no ruby bearings. Only the balance wheel has got a single ruby bearing on the cock.
The gear train is standard for a cylinder movement.
A speciality is the round and rare ETA hallmark, which was used only for a short period of time.
On the dial side, there’s a contemporarily modern rocking bar winding system with a very simple click mechanism, which consists only of a single spring.
|Number of jewels:||1|
Nickel anular balance (three legs)|
|Balance bearing / direction hairspring:||Counterclockwise|
|Adjust mechanism:||Long regulator arm|
|Construction type:||solid construction|
|Winding mechanism:||rocking bar winding system|
|Setting lever spring:||4 hole(s)|