1c Pan-American, Center Inverted (294a). Block of four, h.r., deep rich colors and proof-like impressions, bottom left stamp light natural gum bend, tiny hinge thins affect three stamps, top left is sound

VERY FINE APPEARANCE. A RARE BLOCK OF FOUR OF THE ONE-CENT PAN-AMERICAN INVERT.

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 1869s. 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 -- the large block offered in our 2018 sale of the William H. Gross United States Stamp Treasures. Some of the blocks may have been broken into singles.

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