GB 1958 SG573var Mint "Dollis Hill Phosphor Trial" all over green phosphor
Stock Code: P11205183
1958 2d Light red brown "Dollis Hill Phosphor Trial". Very fine perforated block of four on gummed crowns watermarked (upright) paper, with an all over green phosphor showing a strong phosphor reaction. Scarce. Spec. ST5(3)b.
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