ACP = Advanced coated paper

PVAD = Polyvinyl alcohol acetate dextrin gum

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34p Slate blue
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hd36_38
ACP/PVAD (Harrison/photo)
Cylinder 1 [10.1.90]

HD36 - 34p Slate blue, ACP/PVAD, screened value (Cyl 1) (Harrison/photo) Deegam A340.1.1 - S.G. W794 - Concise 1473 - Stoneham PB17
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HD37 - 34p Slate blue, ACP/PVAD, non screened value (Cyl 1) (Harrison/photo) Deegam A340.1.1b
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