EXTREMELY FINE. THIS UNIQUE PLATE NUMBER BLOCK OF THE FAMOUS 1918 24-CENT INVERTED "JENNY" IS CONSIDERED BY MANY TO BE THE MOST VALUABLE ITEM IN UNITED STATES PHILATELY AND ONE OF THE MOST VALUABLE PHILATELIC ITEMS IN THE WORLD.
Discovered and acquired by William T. Robey at the New York Avenue post office in Washington D.C. on May 14, 1918. Ex Edward H. R. Green, Amos Eno, B. D. Phillips and the Weill Brothers of New Orleans. Featured in the "Aristocrats of Philately" exhibits at Anphilex 1971 (New York City) and Interphil 1976 (Philadelphia). With 1989 P.F. certificate.