The accompanying factory letter lists this Bisley as a Flattop with 7 1/2 inch barrel in .44 caliber, blue finish and type of stocks not listed when shipped to William Read & Son of Boston on January 15, 1897. The barrel has the one-line Hartford address on top and "(BISLEY MODEL)/COLT FRONTIER SIX SHOOTER" on the left side. The frame has the two-line patent dates marking followed by a circled Rampant Colt. The frame has a dovetail mounted target rear sight, and the barrel has a target front sight. Matching serial numbers are on the frame, both grip panels, trigger guard and back strap. Colt only manufactured 78 Bisley Flattop Target revolvers chambered in .44-40 WCF.