1863, 2¢ black, Die I, Large Die Proof on India, Red "Specimen" Overprint. Mounted on large 133x216mm card from N.B.N.Co. salesman sample book, card with green "Specimen, Postage Stamp From The National Bank Note Company, No. 1 Wall Street, New York" imprint at bottom, fresh and Extremely Fine, a rare specimen die proof, Scott catalog $10,000 for normal large die proof. Scott No. 73P1 var.  Estimate $2,000 - 3,000. $0 (Image)

1863, 2¢ black, Die I, Large Die Proof on India, Red "Specimen" Overprint. Mounted on large 121x190mm card from N.B.N.Co. salesman sample book, card with red "Specimen, Postage Stamp From The National Bank Note Company, No. 1 Wall Street, New York" imprint at bottom, exceptionally fresh, Extremely Fine, ex Finkelburg. Scott No. 73P1 var.  Estimate $2,000 - 3,000. $0 (Image)