British-proofed Colt No2 Deringer s/n 1781 manufactured circa 1870-1890. Rare pistol (only about 9,000 manufactured) in obsolete .41 rimfire calibre. Overall very nice condition. Good barrel address, serial numbers and engraving to the frame. Good action with an average bore. I bought 1781 as one of a pair to 1906 (stock number 6157).