nd89
ACP = Advanced coated paper PVA = Polyvinyl alcohol acetate gum
FCP = Fluorescent coated paper
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ND89 - Northern Ireland 39p amethyst, ACP/PVA (Cyls Q1Q1, Q2Q2, Q3Q3, Q4Q4) (Questa/litho) - Deegam N390.1.1 - S.G specialised XNL63 - Stoneham U75 - Concise NI68

Advanced coated paper from cylinders Q1Q1, Q2Q2 [3.12.91] - Q3Q3, Q4Q4 [13.3.93]

ND89a - Northern Ireland 39p Amethyst, FCP/PVA (Cyls Q1Q1, Q2Q2, Q3Q3, Q4Q4) (Questa/litho) - Deegam N390.2.1 - S.G specialised XNL63a

Fluorescent coated paper from cylinder Q1Q1 [12.91]