.32 Rimfire. 4" barrel length. SN: 730. Blued metal finish with octagonal barrel, varnished walnut grips, and brass front blade sight. Single action six-shot removable cylinder revolver with cylinder pin doubling as ejector rod. Serial batch numbers match on barrel, cylinder, and frame. Left barrel shows two-line address and patent reading ALLEN & WHEELOCK WORCESTER. MS. U.S./ALLEN'S PAT'S. SEPT. 7. NOV. 9. 1858. Left frame shows the JULY 3 1860 patent marking. Cylinder is roll engraved with a hunting pasture scene.