A Preferred Unit Steam Generator with 3 gauges made by the Kewanee Boiler Co; image credit on full record.
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Gauge (3); Kewanee Boiler Co, Preferred Unit Steam Generator, Iron Mount, 21 inch.
Kewanee Boiler Co. Mounted Steam Gauges, American, early 20th century. A steam pressure unit consisting of an iron plate reading PREFERRED / UNIT STEA... [more detail available via subscription]