Make me an offer!
I have inherited this gun. With my amateurish gun identifying skills I believe this is a Model 30 or 3000 JP sauer and Sohn. It has two side by side shotgun barrels, about the size of a 12 guage, and 1 rifled barrel underneath. I do not know the caliber, but the serial number is extremely low - it is probably very early 1900s. I found one model with a later serial number online dated to 1920, so probably younger than that. It probably shoots an obscure cartridge of the times. At auction, guns like these have seemed to float between $2000 and $4000, with some particular kinds like the luftwaffe one going higher. Will meet locally only. You can look the thing over. Its been well cared for for generations, though scarcely used.
text me at five12-90six-6one25