Some very good ideas and advice here.
On the other hand, I wouldn't touch it. My reason is, similar drillings (with good barrels) are plentiful here in middle Europe and don't cost much. But such a repair/restoration if done by a good professional could cost a small fortune. So here this gun would be considered a wall hanger or a parts gun. IMHO of course.
With kind regards,
Jani
Best move-- couldn't discern the first word in German on the barrel- but gewehr is rifle and lauf is barrel, the double barreled aspect (16 gauge perhaps) ist- Doppelflintschroppen I believe- too bad, always the sad element of distrust in firing an older quality weapon some jackleg gunjockey has boogered up !!
