Vintage Home Chemical Co. Soda-Acid Fire Extinguisher

This is a vintage 2.5-gallon soda-acid fire extinguisher manufactured by the Home Chemical Co. of Rochester, New York. The cylinder is constructed primarily of polished copper, featuring a prominent, large rectangular brass identification plate riveted to the center. The brass plate is embossed with clear instructions ('TO START TURN BOTTOM UP') and technical specifications, including a 'TESTED 350 LBS' rating and Underwriters' Laboratories certification marks. The top of the unit features a heavy threaded brass cap used for filling and maintenance. Attached to the side is a red rubber discharge hose with a black nozzle and brass fittings. In terms of condition, the copper body displays a moderate amount of surface patina, light tarnishing, and several small dents and abrasions consistent with its age and industrial use. Some green oxidation (verdigris) is visible near the joints and rivets. The rubber hose shows signs of aging, including stiffness and surface cracking. Based on the construction style and markings, this piece likely dates from the early to mid-20th century (circa 1920s-1950s). The craftsmanship is characteristic of commercial-grade fire safety equipment of that era, emphasizing durability through heavy-gauge metal and riveted construction.