Value of German Drilling?

I have a German or Austrian Rifle/Shotgun combo. 16 ga.over 6.58x58R. It is highly engraved with four claw scop mounts/no scope. It has Buffalow trigger guards,butt plat and pistol grip cap.It has cocking indicators and engraved spring loaded cartridge holder in the stock. It is all original. Krupt barrel, Nitro steel. Made in 1928. It is a nice weapon. Does anyone know what the value of a weapon like this would be? I don't see any makers name, just a lot of different crowns and marks that I don't recognize. It has a raised cheek piece and a folding rear sight in front of the scope mounts. Who would know? My email address is dwyer1@cmc.net

Bill Dwyer[:D]