(Imprints & Plate Numbers) 1867, 2¢ black, F. Grill. Bottom margin plate block of 8 with plate "No. 51" and "National Bank Note Company" imprint, without gum, centered a bit into perfs at bottom, strong color and impression, small thin in second top stamp and small tear in bottom right stamp, Fine appearance, a lovely Blackjack plate block and the largest known plate "No. 51" multiple, plate block listed but unpriced in Scott; with 2009 P.F. certificate. Scott No. 93  Estimate $2,000 - 3,000. $0 (Image)

(Imprints & Plate Numbers) 1867, 2¢ black, F. Grill. Bottom margin single with plate "No. 53" and part imprint, central circle of wedges cancel, faint diagonal crease, otherwise Fine, a very rare used plate number single. Scott No. 93  Estimate $750 - 1,000. $0 (Image)