Great Britain 1958 2d red brown 'Dollis Hill Phosphor Trial', SG573var

Great Britain 1858 Queen Elizabeth II 2d 'Dollis Hill Phosphor Trial', SG573var.

A very fine perforated horizontal pair on ungummed unwatermarked specially prepared hand made paper, with all over green phosphor showing a strong phosphor reaction.

A scarce specialised QEII philatelic piece.

GB Specialised Catalogue No: ST4(3)a.

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