The piece has been identified as a 1920 Gaspar Arizaga side by side 20 gauge shotgun. It is rare to have a 20 gauge side by side from the era. The firearm also was inovative showing added features that changed side byside shotguns of the day such as: top mounted internal safety, internal pin fire, and the opening on the receiver was an expensive addition also. This is a double barrel side-by-side (sxs) 20 gauge shotgun.The firearm shows great condition with hand engraved accents across the entire reciever, on the top, sides,and underneath. The piece shows hallmarks across the inside of the receiver and under the barrel which date itto the 1920's made in Spain. The top of the barrel is marked, "Krupp Fluid Steel", "Made in Spain." The piece shows original good condition solid wood and has a clean barrel. The shotgun is in great condition. Has theoriginal basket weave design butt stock. Serial number P.G. 33301. 20-70.