D" in blue; each in a perforated sheet of nine on ungummed unwatermarked paper and each stamp with a 2mm. punch hole, fine; also 5d. top left corner block of four in dull blue-green" /> Proof Specimen Block Larger Than four ½d. in brown and 1d. in black and blue-green each overprinted "WATERLOW & SONS LTD./SPECIMEN" in black, and 3d. in brown-purple, 4d. in green and 2/- in orange-vermilion each overprinted "WATERLOW & SONS L<SUP>D</SUP>" in blue; each in a perforated sheet of nine on ungummed unwatermarked paper and each stamp with a 2mm. punch hole, fine; also 5d. top left corner block of four in dull blue-green | Christie's