Another large 6-shot .44-caliber percussion revolver. Has a 7.5\ part-round/part-octagonal barrel. Frame, hammer and loading lever are case colored; remainder blued, with a brass grip frame and square backed trigger guard. Trigger guard is silver-plated on the Civilian Model only. Another distinguishing feature on First Model is the oval cylinder stop notches. Serial number range is 1341-8000. There were approximately 7,000 made. Cylinder is roll-engraved; barrel stampings read \"Address Saml. Colt, New York City.\" \"Colt\'s Patent\" appears on the frame. Military Models, letters \"U.S.\" also appear on the frame."