That’s a fascinating piece—congrats on the find. A true 6 bore double in that kind of condition doesn’t come along often. The 6 bore itself is a massive ~.919 caliber and was already falling out of favor by the late 1800s as more practical bores like 8 and 10 became dominant . Add in muzzle-loading, double barrels, and no-name/continental production, and you’re looking at something produced in relatively small numbers even in its day.
If it’s still tight, unmolested, and shootable, that pushes it into genuinely scarce territory. Not “one of one,” but certainly uncommon enough to get attention from collectors of big-bore sporting arms.
