The PUW caliber 1075E is a common ladies’ watch form movement of the usual size of 5 1⁄2 lignes. It was since the mid 1960ies one of the successors of the PUW 74. Since it passed the official quality checks in 1967, you can assume, that it appeared in the mid 1960ies.
The only difference between this movement and its precessor PUW 74 has got a jewel beared minute wheel instead of the cap jewels of the escapement wheel.
The three leg annular balance on the specimen shown here is beared in two Incabloc shock protection bearings.
It seems, like this movement was available in two versions, one with distinct mainspring barrel bridge and one, like displayed here, only with one single bridge, which coveres gear train and mainspring barrel.
On the dial side, you see the yoke winding system and the cap jewel of the escapement wheel. The housing of the cap jewel is a bit odd, since it offers space for a second cap jewel, but that space is not used.
|Number of jewels:||17|
Nickel anular balance|
|Balance bearing / direction hairspring:||Counterclockwise|
|Adjust mechanism:||Hairspring key|
|Construction type:||solid construction|
|Winding mechanism:||yoke winding system|
|Setting lever spring:||3 hole(s)|
|Size:||5 1/2''' (measured: 15,5 x 13,2mm)|
Flume: K3 77|