PCP = Phosphor coated paper PVA = Polyvinyl alcohol acetate gum
FCP = Fluorescent coated paper
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nd46

ND46 - Northern Ireland 14p greyish blue, PCP/PVA (Cyls Q1Q1, Q2Q2) (Questa/litho) - Deegam N140.1.1 - S.G specialised XNL10 - Stoneham U44 - Concise NI38

PCP from cylinders Q1Q1, Q2Q2 [8.4.81]
nd47

ND47 - Northern Ireland 14p dark blue, FCP/PVA, 4mm 'SA' phosphor bar right of centre CB (OR) (Questa/litho) - Deegam N140.2.1 - S.G specialised XNL11 - Stoneham U59 - Concise NI39

4mm 'SA' phosphor bar right of centre from cylinders Q1Q1, Q2Q2, Q3Q3, Q4Q4 [8.11.88]