6c Dull Brown, USIR Watermark (271a). Clear "I" watermark, better centering than usually seen on this difficult issue, rich color, oval grid cancel

VERY FINE. A RARE USED EXAMPLE OF THE 6-CENT 1895 "USIR" WATERMARK ERROR. ONLY 26 ARE KNOWN TO US.

The "USIR" (United States Internal Revenue) watermark error occurred when a supply of paper reserved for revenue stamp production was used for printing the 6c and 8c postage stamps. Our updated census of this issue records less than 30 used copies certified as genuine by the Philatelic Foundation, plus two uncertified copies.

With 1994 and 2010 P.F. certificates

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