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.
Beacon Boiler Reference Book, Boilers Made Between 1959 and 1972, Part 4
This section contains pages A63 through A84 and includes ratings for these manufacturers: Portmar Boiler Co., Inc., Penn Boiler Div. Pebbco Industries, Inc., Rheem Mfg. Co., Roberts-Gordon Applicance Corp., Slant/Fin, The H.B. Smith Co., Stewart-Warner Corp., Thatcher Furnace Co., Themo-Dynamics, Thermo-O-Tek, Inc., Toridheet Div. Cleveland Steel Products Co., Utica Radiator Corp., Van Wert Mfg. Co., Waltham Products, Inc., WEstcott Snyder Mfg. Corp., Weil-McLain Co., York-Shipley, Inc.
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