1873 1¢ Postal Card Proofs. Lot of 12 proofs all on unwatermarked stock with two in issued color on canary and very smooth buff, one on granite stock in issued color, five on rough card stock in various colors, three on smooth card stock with issued stamp color on various colors of paper and one on vertically laid stock with pink stamp color, couple minor flaws, generally Very Fine. Scott No. UX1, UX3  Estimate $500 - 750. $0 (Image)