This rifle is built similar to the English transitional percussion revolvers of the 1840s and 1850s. The casehardened cylinder has small holes at the back of the chambers as is common on percussion revolvers but was not fitted with nipples. It was previously theorized that it uses a proprietary teatfire cartridge, but it may be an incomplete prototype meant to have percussion nipples in its final form. The only marking is a small "E" in a partial oval, likely traces of a Liege "E/LG" proof. The four-groove rifled barrel has a black mounted blade front sight and an adjustable rear sight of the same type found on Swiss Feldstutzer rifles. There is a small lever on the right that adjusts the position of the hammer. It is mounted with a nicely figured walnut stock with a casehardened buttplate.

Fine with 50% plus of the original blue and casehardened finish, some areas of dark patina, and isolated spots of minor pitting. The stock is also fine and has some mild dings and scratches. Mechanically fine.