Great Britain 1872 1d black South Kensington Exhibition Proof (Die II, Plate 27), SGDP36.
A superb four margin example lettered "BG", printed in black on soft white card.
Scarce, only one sheet of 240 were printed.
SG Catalogue Value:£2,000.
Official permission was granted to printers, Perkins Bacon to print proofs of the penny black on thick white card specifically for display at the International Stamp Exhibition at South Kensington in 1872. The printers were allowed to retain this sheet after the exhibition. Upon the liquidation of the firm in 1935 the sheet was broken up and sold.
