Fantastic Adventures vol. 1, no. 4 (November 1939)
Futuristic flying machine but it still has turbo-props, it's weird how the imagination only went so far.
I like how the artist had to include some kind of detail behind the skyscraper to make us understand it was being vaporised, not just turning blue.
Original magazine: https://archive.org/details/Fantastic_Adventures_v01n04_1939-11_missing_ifc