Great Britain 1937-47 ½d-2½d Definitives (Dark colours, Watermark sideways) Imprimaturs, SG462/6avar

Great Britain 1937-47 ½d-2½d Definitives (Dark colours, Watermark sideways), SG462/6avar.

Very fine unmounted mint with full original gum set of five imperforate imprimaturs with 'British Postal Museum and Archives' handstamps on reverse.

Very scarce.

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