Tabatière Mle 1857/67 rifle
Made by the Manufacture Impériale de Saint-Etienne c.1857 as a rifled musket, and converted c.1867 to be loaded from the breech.
17,5mm brass-and-cardboard centerfire cartridge, single shot breech-loader, the breech block swings open on the side and can be pulled backward on a spring-loaded guide to extract the spent round.
I like how the sights on this thing are like ‘point-blank’ and ‘way the fuck out there’.