U.S. Model 1840 "Wristbreaker" by Ames (SW1852)
Made in 1851 by the Ames MFg. Co. Curved blade is 36" in length with a thin 18" fuller. Blade is mostly a smooth dark grey patina with light pin-prick surface oxidation visible. Ricasso is marked "US/A.D.K", opposite side "Ames MFG. Co./Cabotville/1851". Leather wrap around wooden grip is cracked and wire is missing.