Here are photos of a circa-1944 Perfex Series 155 Magic Dial Thermostat, as well as the instruction manual.
GE Atomizing Boiler
Here is some information about the GE Atomizing Boiler. The first part of this document comes from the 1960 Audel Oil Burner Guide, written by Frank Graham. The second part is from the 1966 Sid Harvey Trouble Shooting Guide, and contains more of the specifics.
Thanks to Frank "Steamhead" Wilsey of All Steamed Up for sharing.
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Perfex Series 155 Magic Dial Thermostat
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