Marshalltown, Iowa Large Antique Vacuum Gauge Trident $24.15 USD Sold on: 2013-Apr-07 Marketplace: eBay 1 Treasure 0 Trash 100% Detail: This antique gauge has a cast iron body, a 7" diameter bronze (I believe) rim, and a brass face. The face reads "DUNHAM SYSTEM OF STEAM HEATING C.A. DUNHAM COMPANY MARSHALLTOWN, IOWA VACUUM TRIDENT TR... More Relevance Historical Items
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