The 1937 edition. It’s 4 x 7″ and, ta da!, it opens out to this:
Martin M-130 Clipper (there were three made for Pan Am starting in 1935: The China Clipper, The Philippine Clipper and the Hawaii Clipper) (one more, I found out, was made for the Soviet Union: the Russian Clipper) (parenthetically write much?) The other aircraft could be an artist’s rendition of a DC-2, which Pan-Am was also flying in the 1930s.
This pamphlet lists all the departure and destination points for Pan Am in 1937. They were all over the place.
Uncle Bob's Pix 