8c Violet Brown, USIR Watermark (272a). Showing clear "R" of "USIR" watermark, choice centering with well-proportioned margins, deep rich color, light cancel, Extremely Fine, a beautiful example of this error, 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, there are approximately 75 known of the 8c, but many are either off-center or have flaws, with 2002 and 2006 P.F. certificates (XF 90) and 2007 P.S.E. certificate (VF-XF 85; SMQ $1,100.00)

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