Perfex Series 155 Magic Dial Thermostat
Here are photos of a circa-1944 Perfex Series 155 Magic Dial Thermostat, as well as the instruction manual.
Bundyweld Tubing
Bundyweld was lightweight tubing that came out of the automobile industry and was a radiant-heating alternative to wrought iron and steel pipe in the days following World War II when those metals were still scarce. This is an ad for Bundyweld Ceiling Radiant Heating from 1933.
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