Registry Seal, 1875 Special Printing, bluish green, imperforate. Block of four, without gum as issued, clear to large margins all around, bright and fresh, detailed impression with strong color, pinhole in left margin, Very Fine and exceptionally rare. Scott No. OXF2 var.  Estimate $2,000 - 3,000. The paper is typical hard white paper used by the National Bank Note Company at this time for the reprints of other issues including the Newspaper and Periodicals. This is the paper used for the printing of the sheets of nine seals noted in Scott. This block is from one of those sheets and other than the single reported sheet, this is the only example of this special printing. $0 (Image)