Worldwide Stamps and Covers

1895 Watermarked USIR, 6c dull brown used, well centered, good color, v.f., with 2017 (Graded VF-80, used) PSE certificate. A beautiful and rare 6c with the "R" of "ISIR" watermark, only 27 (!) examples recorded, this being one the better known. 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. Unlike its more common 8c counterpart, the 6c is an extremely rare stamp. Only 24 used copies certified as genuine by The Philatelic Foundation, plus three uncertified copies. Many examples have perfs either close or touching the design,
Cat. Val. $8,500
Estimate: $4500