Routes of the Flying Clipper Ships c 1935

Year: c 1933
Artist: Kenneth W. Thompson
 
Image credit: Pan Am History, Design & Identity by M.C. Huhne
 
The second image is a 1950s reprint by American Heritage. It is distinguised by richer colors, slightly glossy paper, a wide white margin, and "Printed in U.S.A" in the bottom left corner.