pc129
20½p Ultramarine
PCP1 = Phosphorised coated paper (Matt)

PVAD (Dextrin) = Polyvinyl alcohol acetate dextrin gum

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PC129 - 20.5p Ultramarine, PCP1/PVAD (Cyl 1) (Harrison/photo) - Deegam 205.1.1 - S.G specialised U278 - Stoneham M337 - Concise X961

From cylinder 1 [30.8.83]