Proof Block Larger Than four 1984, National Insurance Stamps, printed by Bradbury, Wilkinson, plate proofs with printer's sheet of 200 of the background in brown and printer's sheet of 200 of "CVII" in rose; also perforated stamps (1,000) in printer's sheets of 200, with "CIV" (400), "CV" (200), "CVIII" (200)