nd1_2
OCP = Original coated paper PVA = Polyvinyl alcohol acetate gum
FCP = Fluorescent coated paper
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ND1 - Northern Ireland 2.5p magenta, OCP/PVA, 4mm screen 150 phosphor centre band, PVA gum (Cyl 4) (Harrison/photo) - Deegam N25.1.1 - S.G specialised XN18 - Stoneham U18 - Concise NI12

Original coated paper from cylinder 4 [7.7.71]

ND2 - Northern Ireland 2.5p magenta, FCP/PVA, 4mm screen 150 phosphor centre band, PVA gum (Cyl 4) (Harrison/photo) - Deegam N25.2.1 - S.G specialised XN19 - Stoneham U22

Fluorescent coated paper from cylinder 4 [6.73]