Great Britain 1971 5p reddish-violet (Scotland, Two bands) imprimaturs, SGS20var Music vintage example

vintage example

Right marginal

Einstein kindly obliged and returned the portrait

Great Britain 1840 1d Black Plate 1

Great Britain 1971 5p reddish-violet (Scotland, Two bands) imprimaturs, SGS20var Music vintage exampleGreat Britain 1971 5p reddish violet (Scotland, Two bands), SGS20var. A superb unmounted mint, with full original gum, left hand marginal horizontal pair of imperforate imprimaturs each with a "BPMA" handstamp on reverse. 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