Harrington & Richardson (H&R) Single Shot Shotgun

This is a Harrington & Richardson (H&R) single-shot, break-action shotgun receiver and action assembly. The firearm features a steel receiver frame notable for its color case hardened finish, which displays characteristic swirling patterns of mottled blues, grays, and oranges. The markings on the left side of the frame are clearly stamped and identify the maker as 'HARRINGTON & RICHARDSON, INC.', located in 'GARDNER, MASS.', with the 'MADE IN U.S.A.' designation. It includes U.S. Patent No. 3988848 and serial number BA559526. The assembly includes a visible external hammer, trigger, and trigger guard. A portion of the wooden forend is visible at the front. Regarding condition, the metal surfaces show significant surface oxidation and 'peppering' over the original case hardening, particularly concentrated on the flat face of the receiver. There is evidence of handling wear and minor scratches consistent with a field-used utility firearm. This model design is a staple of mid-to-late 20th-century American sporting arms, known for its rugged 'Topper' or similar series construction and reliable break-open mechanism. The craftsmanship is utilitarian yet robust, utilizing pinned construction for the fire control group.