SN 16480. Special double trigger system. Lot of original blue. Fine engravings on all parts. On the barrel the signature Fabr. P. Stevens te Maastricht. On the left side of frame ADAMS 1856 PATENT and W. Tranter patent, on the right side: Adams Patent 16480, Crown over PS for P.Stevens and Crown over AF for Auguste Francotte. Signed on frame at grip A. Francotte a Liege. On the cylinder the Liege ELG proof mark and Crown over AF. Fine chequered grip in original finish.