1948, 3¢ Four Chaplains. On India die sunk on card (193x138mm), "C" security punch at bottom left corner of design, reverse with blue inventory number handstamp and "Engraver's Stock Proof, Authorized By…" purple handstamp with initials at bottom, Extremely Fine, this is believed the only known example in private hands, listed but unpriced in Scott, ex Livingstone. Scott No. 956P1  Estimate $2,000 - 3,000. $0 (Image)