75th Anniversary Universal Postal Union

FIRST DAY O.S. MAIL Afiss LETTERS ISSUE Art Craft 10TH ANNIVERSARY NEITHER SNOW, NOR RAIN, NOR HEAT, NOR GLOOM OF NIGHT STAYS THESE COURIERS FROM THE SWIFT COMPLETION OF THEIR APPOINTED ROUNDS 75th ANNIVERSARY UNIVERSAL POSTAL UNION CHICAGO 9-AM 1949 ILL U.S.POSTAGE AIR MAIL 15 15 FIRST DAY OF ISSUE 1949 THE UNIVERSAL POSTAL UNION AMERICAN AIR MAIL SOCIETY CONVENTION STATION