.31 Iron mould with sprue cutter, for Hartford manufactured Colt Model 1849 Pocket percussion revolver. Straight leg mould, stamped “COLT’S PATENT” with an apostrophe, on the top face of the sprue-cutter, close to the hinge. The two cavities are for a round ball nearest the hinge pin and a conical with a heel grease groove below it. The groove helps facilitate loading into the cylinder chamber. The locating pin is on the right leg. An inspectors number 2 is stamped on the face of the right leg. The finish is blue.