Great Britain 1952–54 2d–1s6d Wildings (Watermark Tudor Crown) imperforate imprimatur set, SG515/31var.
A very fine unmounted mint, with full original gum, set of seventeen, all left-hand marginal examples with "NPM" handstamps on reverse.
Very rare, with only ten sets released from the National Postal Museum Archive sales in 1984/5.
A remarkable survival from the early reign of Queen Elizabeth II.
