"...standard 12 gauge 26" Spanish two-trigger box-lock double."
Found the following words at gunauction.com:
"Miguel Larranaga was a prolific manufacturer of durable double barrel-shotguns in the 1960s-1970s. The company was located at: Santa Ana 32, Placencia de Las Armas, Guipuzcoa, Spain. It was one of dozens of Spanish Basque area family-owned gun manufacturers."
What else is there to know? Does it shoot? Go shoot it and find out. There are guns by this maker available online at the usual sites. The ones I found ranged in price from $190 to $1399. Google the name to find them. If I were in your shoes, and I liked the gun, I would ring the barrels first, then buy it if they ring true. What's it worth? It's worth what you and your buddy, the seller, decide it's worth.
