The Guba 25 was launched between 1953 and 1957. It was completely unmarked, but could be identified thanks to the scraching of a watchmaker on the dial plate and the Flume Werksucher from 1957.
It uses seventeen jewels, among them one cap jewel on the dial side. The gold-tone nickel screw balance is not shock protected. The size of the movement is the formerly common 5 3/4 x 8 3/4 lignes.
The Guba 25 was made in different versions and probably over a longer time.
|Number of jewels:||17|
Nickel screw balance|
|Balance bearing / direction hairspring:||Counterclockwise|
|Adjust mechanism:||Hairspring key|
|Winding mechanism:||yoke winding system|
|Setting lever spring:||3 hole(s)|
|Size:||5 3/4 x 8 3/4'''|
Flume: 1952 33|