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.
How to Have a Smiling Home - A Guide to Things to Know about Home Heating and How to Have Top Comfort and Save $$$
Here is a well-done promotional piece for the oil-heat industry, circa 1960.
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