1918, 1¢ gray green, Offset, Accountable Paper, block of 11 with right sheet margin, partial strike of purple "Subjects missing from this sheet have been accounted for." handstamp, o.g., some hinge remnants, heavy gum crease in bottom stamps, Fine, ex-George Brett. Scott No. 525  Estimate $400 - 600. ONE OF ONLY TWO RECORDED EXAMPLES OF THIS ACCOUNTABLE PAPER HANDSTAMP. $0 (Image)