An iron bullet mold marked “COLT’S PATENT” and “36P,” denoting .36 caliber, intended for use with the Colt Model 1851 Navy revolver. Manufactured circa 1850–1860, this dual-cavity example casts both conical and round ball projectiles. Constructed of forged blued steel with integral sprue cutter and pivoting arms, the piece represents the standard bullet mold supplied with mid-19th century Colt percussion revolvers. Dimensions approx.: 4.75 x 1.25 in. Provenance: The Al and Carol Cali Collection. Pickup & Shipping: This lot may be picked up free of charge in Gardnerville, NV. It can also be delivered to the Annex Auctions facility for pick up in Sacramento for $25 pre invoice. Shipping via FedEx within the continental U.S. for $50 + 1.5% insurance (unless waived in writing). Combined lot shipping available. Good overall, showing age patina, scattered small oxidation spots, and light tool marks; hinge action remains smooth, and cavities are clean and defined.