Rare prototype Signature Series (3rd Gen) 1851 Navy revolver made as a sample for Colt executives. Has the Coltec logo on the barrel. As new with box, shipping carton, accessory kit and wooden presentation case. A complete set of a rare prototype. Comes with a letter from Anthony Imperato, the president of Colt Blackpowder Arms, explaining what the gun is. They were the company that produced the Signature Series Colts. Consignment.