Great Britain 1934 1½d "Photogravure" large format colour trials, SG441var.
Very fine unused original gum set of four bottom left hand corner marginal imperforate control "16" blocks of four printed in scarlet, red-brown, ultramarine and deep grey-green.
A unique positional set of the utmost rarity and philatelic importance.
Provenance: Ex. Hassan Shaida.
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