Hello Björn,
the Vz36Stella was not produced very often. They say about 100 copies but they do not know exactly.
The predecessor the Vz35 and the successor the Vz47 were produced much more often.
Could you please send me a picture. And that of the locking of the clamping lever.
This is broken at my Vz.36 and must be reprocessed.
best regards
Andreas