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.
Williams Oil-O-Matic "Hushed Heat"
Here is a brilliant 1930s argument for converting your boiler from coal-fire to oil-fire. Wonderful photos as well. Thanks to John Mills for the scan and for sharing.
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