Leifer
Senior Member.
I'm not positive about those airborne trails in the graphic....are they not simply an explanation of aircraft maneuverability ?.....and are but simply "motion lines" added by an illustrator, and perhaps not contrails ?LIFE Magazine, Dec 20, 1943
https://books.google.com/books?id=x...ntrails&pg=PA16#v=onepage&q=contrails&f=false
(the Ad speaks of radio communications).
https://books.google.com/books?id=x...ntrails&pg=PA16#v=onepage&q=contrails&f=false

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