.31" caliber. 6" barrel length. SN: 5587. (Mfg. Ca1848) Item has been refinished overall and features a primarily blued metal finish with casehardened frame and hammer, silver plated brass gripstraps, and one piece walnut grips. Single action percussion five-shot revolver mounting an octagonal barrel and front brass cone sight. The left frame is marked COLTS/PATENT, and the cylinder displays Ormsby's {Ranger and Indian} roll engraved scene. Two line barrel address read ADDRESS SAML COLT/NEW-YORK CITY. The serial numbers match on the cylinder, frame, barrel, arbor pin, wedge pin, and the gripstraps. The triggerguard plate features K and Q inspector's initials. T stamp to the rear barrel lug. Backstrap is inscribed with the name Charles H. Ross. The backstrap has no further details to permit a precise identification of the inscription's origin.