A sturdy iron bullet mold bearing the stamped marking “S.T. B.” along the top flat, likely indicating the initials of the maker or owner. Manufactured during the mid-19th century, this mold features two cavities for round and conical bullets, and an integral sprue cutter. The elongated steel handles and compact block design are consistent with percussion-era American production, possibly intended for a .36 revolver. The crisp initials and overall construction suggest a small workshop or gunsmith-made example rather than a factory-issued piece. 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. Very good overall, showing dark blued patina and minor surface wear consistent with age; hinge operates properly, cavities remain well defined.