This Deringer is unmarked but it appears similar to ones made by H.C. Lombard of Springfield Mass, Merwin & Bray, or Morgan & Clapp during the 1860's. Perhaps its what is known as a "2nd Quality" example that wasn't worthy of some Company's name on the barrel. However, it does have a serial number. Appears to be in .32 rimfire with a 3.75" octagon barrel which swivels off to the side of the frame for loading. Like I said, the only mark on the gun is a serial number on the bottom of the grip/frame and matches one underneath the barrel.
Overall, its in almost perfect condition retaining 97% bright original blue, nearly all the case colors on the hammer, and 98% original varnish on the rosewood grips with some light scratches. Brass frame has turned to a nice untouched mellow patina...appears to have never cleaned or polished. Original German silver front sight with a small notch in the hammer serving as a rear sight. Action works properly and a Very Good bore with wide 3 Groove rifling. An interesting weapon in completely untouched almost pristine condition.