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.
Taco's Taco-Trol System
This circa-1950 brochure features Radiator Heat Plus Taco-Trol for Hot Water Heating Systems from Taco Heaters, Inc.
It reads, "The Taco-Trol is a combination hot water heating system equipped with automatic Taco controls. It performs the double function of providing the home with a more uniform temperature during the winter months and assuring an all-year-'round supply of domestic hot water. Taco-Trol is a forced circulating one-pipe system."
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