Routes of the Flying Clipper Ships, 1941
PAA. Routes of the Flying Clipper Ships. (As of December 7. 1941 Subsequent Wartime Changes Censored). Pan American World Airways. "Wings of Democracy." L. Helguera F.M. Decorative World map showing early Pan American air routes. The note about censored changes is unusual for this map which was published several times apparently around the time of WW II. L. Helguera illustrated several war time posters.