a very nice 11,15x63R - the auction description refer to the mauser M 71 cartridge what would be the 11,15x60R but if wrong I would say its a 11,15x65R LK - 16/65 combination hammer gun with 16/65 double gun barrel's
double gun barrels 75 cm long and damascus steel

combination gun barrel set 70 mm long, the shotgun barrel rifled and also damascus steel
cartridge magazin under the stock cap.
" A. Wostatek aus Göding" , nitro proofed

Hodonín (Czech pronunciation: [ˈɦodoɲiːn]; German: Göding) is a town on the River Morava in the southeast of Moravia, in the Czech Republic http://en.wikipedia.org/wiki/Hodon%C3%ADn

http://www.egun.de/market/item.php?id=4447862

one of the best combination guns I have seen for a while, interesting to see how high it will end.