1c Pan-American, Center Inverted (294a). Block of four, slightly disturbed original gum, deep rich colors and proof-like impressions, all four stamps have extraordinarily choice centering, small thin spot in bottom right stamp

EXTREMELY FINE. A RARE AND DESIRABLE BLOCK OF FOUR OF THE ONE-CENT PAN-AMERICAN INVERT. THIS MAGNIFICENT BLOCK WAS SOLD IN THE SIEGEL 500TH AND 1000TH SALES. IT IS ONE OF THE HIGHLIGHTS OF THE PRICE COLLECTION.

The Pan-American inverts were the first bicolored postage stamps produced by the Bureau of Engraving and Printing and the first invert postage errors issued by the Post Office since the 1869's. The 1c Pan-American Inverts were found in several post offices around the country. Thirteen blocks of four, a block of six and a block of 20 are recorded in our Levi records, some of which may have been broken into singles.

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