8c Trans-Mississippi, Vertical Pair, Imperforate Horizontally (289a). Original gum, lightly hinged, deep rich color, few natural gum creases as found on most examples of this rare error, which originated from one pane of 50

EXTREMELY FINE CENTERING AND VERY RARE. THIS IS THE ONLY MAJOR ERROR OF THE TRANS-MISSISSIPPI ISSUE.

Datz states that 25 pairs are known (including blocks). With 2000 P.F. certificate.

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