Proof 1951 1c. Postal Tax, the American Bank Note Company production file comprising frame die proof in black on cream card (62x62mm.), large die proof in green on India, die sunk on card (188x211mm.); two series of lithographic separations for the vignette stapled in book form and twelve completed lithograph proofs for the vignette. Also an imperforate frame plate proof sheet of 200 stamps, arranged in two panes of 100, and printed on cream card. Photo