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.
Hubbard's Radiator Valve Patent
Wait until you see this wonderful invention from 1922! We wish they still made these. This is the patent for M.G. Hubbard's radiator valve for steam heating. Thanks to Gerry Gill for finding it.
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