.45 Colt. 5.5" barrel. SN: 47592 (mfg. ca.1878). Blued and color casehardened finish, smooth walnut one-piece grip. Single action cartridge revolver with black powder frame, six-chambered fluted cylinder, blade front sight and frame notch rear sight. Barrel marked in a single line: COLT'S PT. F.A. MFG. Co. HARTFORD CT. U.S.A. Address with the broken (missing) serif from the left side of the crossbar of the "T" in the abbreviation "Patent" and double line under the "o" in "Co", both correct for Nettleton range guns. Lower left of frame with three-date in three-line patent marking. Left rear web of triggerguard is marked "45". Matching serial numbers throughout with the exception of the grip which is an ill-fitting replacement. Left of frame stamped US with an apparently more recent stamp that does not appear correct, nor does it have periods after the letters. The apparent HN inspection of Henry Nettleton appears on the backstrap, frame, triggerguard, barrel, cylinder and left side of hammer neck, with the barrel and cylinder both with P proofs. These marks look correct with the frame HN appearing to be stamped under the serial number. Matching number artillery revolvers are scarce, as most are mixed number guns. The apparently spurious "US" on the frame is troubling, but the balance of the revolver appears to be correct.