.36 caliber. 7.5" barrel. SN: 106601 (mfg. ca. 1861). Blued metal finish with case colored frame mounting one piece walnut bell shaped grips and octagonal barrel. Single action six-shot percussion revolver with Ormsby's naval engagement roll engraved to cylinder. Markings include COLT'S/PATENT to left frame with single line address on barrel reading -ADDRESS COL. SAML COLT NEW-YORK U.S. AMERICA-. Item is struck with an L inspection initial to the left triggerguard. Serial numbers match on all parts except for arbor pin, which is non numbered and appears to be a period hand made replacement. Filled hole in butt where a swivel was installed during the period of use. Repaired grip at frame junction on left side. Notch rear sight added to barrel in address, German silver half-moon front sight an old period of use replacement. Item comes in an unmarked leather holster that appears to be a modern reproduction.