Kuduae,

thanks for this information!
As you have seen similar pieces built even later our question is answered.
Anyway, the rifle is quite unique, and it is a pity that it has been "modernized" / vandalized. The auction closed today at 1125 Euro, much less than the cost for scope, mount and barrel liner.

But I am quite astonished that "Ischlerstutzen" were even made in Suhl.

Regards,
Fuhrmann