Lot 1591 ()
1867, 10¢ yellow green, F. grill, vertical block of 15, without gum, strong color on generally bright paper, average centering, left vertical strip rejoined, vertical crease in right strip and lower left stamp faulty; accompanied by a matching unused vertical strip of five which, judging from the downward trend of the horizontal perforations, would have been from the second vertical row to the right of this block, strip is completely sound, Fine, a unique block, being the largest recorded unused multiple of this stamp.Scott No. 96 Estimate $10,000 - 15,000.
Illustrated in Brookman's "United States Postage Stamps of the 19th Century," Volume 2, page 146.