wd27
FCP = Fluorescent coated paper PVAD = Polyvinyl alcohol acetate dextrin gum
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WD27 - Wales 8.5p yellowish green, FCP/PVAD, two 4.75mm B3 phosphor bands (Cyl 1) (Harrison/photo) - Deegam W85.1.1 - S.G specialised XW37 - Stoneham WA36 - Concise W26

Two 4.75mm B3 phosphor bands from cylinder 1 [14.1.76]