BRITISH GUIANA 1940-55 2c black Postage Dues, error, SGD2a/ab
British Guiana 1940-55 2c black Postage Dues, chalk-surfaced paper, upper right corner block of 15 (3x5) showing watermark error W9a 'Missing crown' on R4/4-5, SGD2a/ab.
A stunning unmounted mint block of 15 with full original gum, (hinged in margin only).
An extremely scarce philatelic piece of the highest quality.
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