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.
McDonnell & Miller 101-A Automatic Feeder Patent
This circa-1940 patent is for McDonnell & Miller's 101-A Automatic Feeder. Thanks to Gerry Gill for finding and sharing this patent.
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