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.
H. A. Thrush & Company Catalog
Here's a look at the H. A. Thrush & Company product offering in 1946 for hot-water heating flow control valves, water circulators, pressure reducing valves, relief valves, dual control units, Thrush water heaters, and iron supply tees.
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