I'm posting in the Rifle forum, but the Drilling by definition has shotgun barrel(s) as well. A friend lost her dad and inherited an older German Drilling. Cleaning and looking it over for her was a pleasant in instructive exercise. The gun as two 16 gauge barrels and a 9.3x57R rifle barrel. I did some Internet snooping but was unable to find a manufacturer. Lots of proof marks and very nice engraving. There's a cartridge storage compartment in the butt stock that held 4 rounds, and that's how I determined the rifle caliber. Enjoy the photos of an unusual(in the USA anyhow) firearm.