FCP = Fluorescent coated paper PVAD = Polyvinyl alcohol acetate dextrin gum
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sd38

SD38 - Scotland 11p pastel red, FCP/PVAD, two 4.75mm B3 phosphor bands (Cyl 1) (Harrison/photo) - Deegam S110.1.1 - S.G Specialised XS55 - Stoneham SC52 - Concise S32

Two 4.75mm B3 phosphor bands from cylinder 1 [20.10.76]
phosphor_omitted

SD38mp - Scotland 11p pastel red, FCP/PVAD, phosphor omitted (Cyl 1) (Harrison/photo) - Deegam S110.1.1a - S.G Specialised XS55a - Stoneham SC52a - Concise S32Ey

Phosphor omitted from cylinder 1