1c Pan-American, Center Inverted (294a). Bottom left corner imprint and green plate no. 1139 strip of four, with string of vignette plate letters in black and "1c" denomination imprint in green and black, full original gum with couple of trivial disturbances from hinge removal, few hinge remnants where perf separations sensibly reinforced, small thin spot in selvage below right stamp (does not affect imprint and plate no. strip)

FINE APPEARANCE. THIS IS THE ONLY RECORDED EXAMPLE OF THE ONE-CENT PAN-AMERICAN INVERT WITH A PLATE NUMBER OR IMPRINT. ONE OF THE GREATEST SHOWPIECES OF 20TH CENTURY UNITED STATES PHILATELY.

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 at least four different post offices around the country. Approximately 600 to 700 are known, including thirteen blocks of four, a block of six and a block of 20, some of which may have been broken into singles. This is the only example with an imprint or a plate number contained in our records.

Scott Catalogue price is based on a private sale of this item several years ago.

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