8¢ Albert Einstein Prominent Americans Series

FIRST DAY OF ISSUE INCETON 14 1966 08540 Art Craft PRINC NU "THE MOST INCOMPREHENSIBLE THING ABOUT THE WORLD IS THAT IT IS COMPREHENSIBLE" 8¢ e=mc² ALBERT EINSTEIN Judson 5. Jendsey WORLD RENOWNED PHYSICIST Prominent Americans Series 4314 N. Nelson Her. Peoria Ill. United States 8c EINSTEIN FIRST DAY OF ISSUE