Air Sweeps, at least by the mid 60s had a switch to turn the feature on or off, depending on what was needed airflow-wise. This must be an earlier model. Gibson had a reputation in the refrigeration field as a good product. I do not know if it was deserved or if it was like Maytag's rep: just because they ran forever people liked them. The Georgia Power Company sold Gibson AC units as well as Westinghouse. Gibsons were expensive. Gibson, at least for a time, made window units for AMC which sold for much less. Our neighbors had an 18K AMC; cooled like a sumb*tch as the say down south.
Pete, while were on the topic of AC units, how's that house doing that's for sale in your neighborhood? Have you gotten inside it yet?