Gentlemen,

never heard of Ludwig Koppensteiner in Linz, Austria,. But the shotgun obviously is of German origin. And the features I can see there make me believe it could be a Sauer model VIII: top mounted sears and the rib on the hammer axle, acting as a cocking indicator.

Can you show us more photos please? Especially, all markings on the water table would be of interest. If this gun was exported from Germany to Austria, additional Austrian proofs will be present.

Regards

Martin