Rare vintage Pan American Airways Flying Clipper Ships Postcard

An extremely rare, 1939 Pan American Airways post card. The postcard advertising the Flying Clipper Ships overnight routes to Europe. Wonderful graphic from the picture, "Yankee Clippers Sail Again" by Gordon Grant. The postcard is unwritten in very good vintage condition with bumped corners and some reddish staining on the back, see photos for details.

A wonderful example of transportation history.