Great Britain 1919 10s Dull grey blue, SG417var

Great Britain 1919 10s Dull grey blue, SG417var

Very fine unmounted o.g. left hand marginal irregular block of four printed by Bradbury Wilkinson overprinted "CANCELLED" type 24 and endorsed in manuscript Cancelled 1st Sept" on each stamp and "10/8/20" in sheet margin. A wonderful exhibition piece of the highest rarity, these being the only known examples. Spec. N71wa. 2005 BPA Cert.

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