1861 12c Black large die proof on India paper die sunk on card (111 x 108mm), with 'National Bank Note Co. N.Y.' imprint below design, superb. Scott 69P1, cat US$700
1861 12c Brown trial colour die proof on India paper die sunk on card (75 x 68mm), superb colour and condition, ex Finkelburg. Scott 69TC1, cat US$2500