The product is an antique vintage industrial refrigeration ammonia gauge manufactured by Wright-Ziegler Co. in the United States circa 1910-1930. The gauge comes with a cast iron mount, adding to its collectible value. This piece of equipment would have been used for measuring ammonia levels in a woodworking or carpentry setting, showcasing the historical significance of tools in these industries. The brand\'s reference indicates a reputable and long-standing history in producing specialized tools for woodworking and carpentry purposes. About 26\"x28\".
ammonia hvacr hvac york, frick, nh3 vintage antique gauges panel gauge board, industrial refrigeration,
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