.32 ACP. 3.5" barrel length. SN: 17136. Blued metal finish with checkered black synthetic H&R logo grips and featuring fixed rear notch and half moon front blade sights. Simple blowback operated striker action autoloading pistol fed by detachable single stack magazines. Left slide is marked H.&R. SELF-LOADING/CALIBER 32. Right slide is struck with three line manufacturer and patent mark reading HARRINGTON & RICHARDSON ARMS CO./WORCESTER. MASSACHUSETTS, U.S.A./PAT. AUG. 20. 1907. APR. 13. NOV. 9. 1909. Serial numbers match on the slide, barrel, and frame.