wd89_90
PCP = Phosphor coated paper PVAD = Polyvinyl alcohol acetate dextrin gum
ACP = Advanced coated paper
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WD89 - Wales 31p lilac, PCP/PVAD (Cyls Q3, Q4, Q5, Q6) (Questa/litho) - Deegam W310.1.1 - S.G specialised XWL58 - Stoneham WA71 - Concise W65

PCP from cylinders Q3, Q4, Q5, Q6 [23.10.84]

WD90 - Wales 31p lilac, ACP/PVAD (Cyls Q5, Q6) (Questa/litho) - Deegam W310.2.1 - S.G specialised XWL59 - Stoneham WA89

ACP from cylinders Q5, Q6 [27.1.87]