Great Britain 1955 2s6d–£1 “Castles” (Waterlow printing) imperforate imprimatur set of four, SG 536/9var.
A superb unmounted mint, with full original gum, right-hand marginal set in horizontal pairs, each with a “BPMA” handstamp on reverse.
A scarce and attractive imprimatur set, seldom available outside institutional holdings.
Exceptional provenance as they were released from the British Postal Museum Archives in 2014. Prior to this they were stored in the museum archives in climate controlled vaults since being printed and are therefore in uncirculated mint condition.
