75th Anniversary, Universal Postal Union

FIRST DAY of ISS ISSUE Art Craft 10TH ANNIVERSARY MONUMENT OF THE UNIVERSAL POSTAL UNION AT BERNE, SWITZERLAND 75th ANNIVERSARY UNIVERSAL POSTAL UNION SEATTL NOV 30 9-AM 1949 WASH U-S POSTAGE AIR MAIL 25¢ 1874-1949 IVERS POSTAL UNION FIRST DAY OF ISSUE