Monaco J39a--J47a pairs mlh

Monaco J39a-J47a pairs (J39-J36, lightly hinged, $79.40. Michel P40-P59. Due stamps 1953. . Carrier pigeon, Sikorsky helicopter; Old railroad engine, modern locomotive; Old monoplane, Comet airliner; Steam automobile, Sabre sports car; da Vinci's flying machine, Rocket; Post rider, motorcyclist.