The UMF caliber 24-32 adds an indirectly driven center second hand to the base caliber UMF 24-30.
In the old construction of 1973 (week 50), you can see, that this movement did not yet have a moveable hairspring stud, since that was released in 1975.
On the dial side, you can easily spot the differences between the old (pre 1975) construction and the newer one: On the old construction, the rocking bar winding mechanism is made of metal, on the newer one, it is made of plastic.
Nickel anular balance|
|Balance bearing / direction hairspring:||Clockwise|
|Adjust mechanism:||Hairspring key|
|Winding mechanism:||rocking bar winding system|
|Setting lever spring:||2 hole(s)|
|Functions:||hour, minute, second|
Flume: K3 66|