Post some images of the touchmarks. I would hazard a guess that Josef Ritter of Vojkovice nad Ohr/Wickwitz, just South of Ostrava, was a Bohemian firearms merchant. He was somewhere close to Jani. Maybe Jani has visited his shop site. But I'd say he sourced his wares from the Austrians. If so, a proof date will be noted. Does it have the Rigby/Charles Harvey forend underlever?

Kind Regards,

Raimey
rse