Tourism Year of the Americas '72, Domestic and International Air Mail, First Day of Issue

Front:
WASHINGTON D.C. MI VERNO N TOURISM YEAR OF THE AMERICAS 72 ANILAD LINCOLN LIBERTY BELL 12:: 11111

Back:
NIAGARA FALLS POSTAL Philatelic Exhibition Brussels Tourism Year JUN IRST DAY OF ISSUE 121972 Tour America Inaugural Rome - Paris of the Americas 72 Artmaster DOMESTIC AND INTERNATIONAL AIR MAIL first Day of Issue