The brass cannon measures at approximately 38 1/2 inches from the muzzle to end of the bore. Functional vent hole with a hinged vent cover. The bore measures at approximately 2 inches. The wood carriage measures approximately 49 inches long with 30 1/2 inch diameter wheels. "P 22" is marked on the left trunnion and on the top left of the carriage. "N JJ" is marked on the right trunnion. Provenance: The Richard P. Mellon Collection