nd29
FCP = Fluorescent coated paper PVAD = Polyvinyl alcohol acetate dextrin gum
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ND29 - Northern Ireland 10.5p greyish blue, FCP/PVAD, two 4.75mm screen 150 phosphor bands (Cyl 3) (Harrison/photo) - Deegam N105.2.1 - S.G specialised XN38 - Stoneham U38 - Concise NI29

Two 4.75mm phosphor bands from cylinder 3 [18.1.78]