Hiscox & Co., 4¢ Black, Watermarked USIR, strong color, nicely centered, small thin and slightly irregular perfs at lower left, Very Fine appearance, a very rare example of the elusive Hiscox & Co. 4¢ Black on Watermarked Paper, only 15 are recorded in the Aldrich census (of which 9 are reported to be faulty). Scott No. RS123d  $2,250. $0 (Image)