Great Britain 1952 10d Prussian blue "Wilding"(watermark Tudor Crown), SG527var

Great Britain 1952 10d Prussian blue "Wilding"(watermark Tudor Crown), SG527var.

A superb unmounted mint, with full original gum, block of four imperforate imprimaturs with "NPM IMPRIMATUR" handstamps on reverse.

A very rare and attractive QEII block from the first approved printing sheet released from the National Postal Museum archives in 1984/5.

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