This is a prototype or one-off over/under sporting shotgun, made in a bullpup configuration. It is basically two long slabs of wood clamshell around a pair of barrels, with the action at the very end in the stock. The breech rotates up to open, activated by a lever on the surface of the buttplate. That’s certainly strange enough to be interesting, but there’s more…the barrels are actually gently curved inside the furniture. And they have to be, in order to line up with both the stock and the sight rib. Crazy!
Sold for $2,300 at the December 2019 RIA Premier auction.