1932, Columbus 20 c. Plate Proofs, a complete sheet of 100 from the Waterlow Archives, fully annotated and worked on with security punches, together with a lower left corner block of four endorsed "Colour Correct 29.6.32", also 20 c. dark green overprinted "WATERLOW & SONS L.T.D. SPECIMEN" mounted on small numbered card, the sheet folded several times and with some light aging, still a fine and rare assembly
