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.
Go Through The Looking Glass with Al and Alice
Join them in their search for the ideal in Automatic Heating Equipment! I think you'll enjoy this 1948 consumer piece about the General Electric boiler. If you've ever wondered how those old beauties worked, this is the place to find out. Wonderful drawings and straightforward explanations.
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