Here are photos of a circa-1944 Perfex Series 155 Magic Dial Thermostat, as well as the instruction manual.
Automatic Heating with Anthracite (1932)
This circa-1932 booklet from the Hudson Coal Company outlines the benefits of heating with coal. As the foreword says, "Science has made remarkable strides in the past few years in perfecting new equipment that has made anthracite the ideal automatic fuel. Everyone is familiar with the heating value and safety of anthracite. This little booklet describes briefly some recent inventions for obtaining automatic heat with anthracite and tells how they can save you money, work, and worry."
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