Great Britain 1955 9d bronze-green (watermark St Edward's Crown), SG551var.
A superb unmounted mint, with full original gum, imperforate bottom marginal horizontal pair of imprimaturs with "BPMA" handstamp on reverse, showing central sheet ornament in margin.
A scarce Queen Elizabeth II imperforate pair of imprimaturs.
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.
