wd22
FCP = Fluorescent coated paper PVAD = Polyvinyl alcohol acetate dextrin gum
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WD22 - Wales 6.5p cerulean blue, FCP/PVAD, 4mm B3 phosphor centre band (Cyls 1, 2) (Harrison/photo) - Deegam W65.1.1 - S.G specialised XW33 - Stoneham WA33 - Concise W22

4mm B3 phosphor centre band from cylinders 1 and 2 [14.1.76]