OCP/PVA
DP numbers are the copyright of the MBPC and are used with their permission.

OCP = Original coated paper

PVA = Polyvinyl alcohol acetate gum

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1½p Black
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fd120b_120c_121b_121c
OCP/PVA, 9.5mm screen 250 B3 phosphor bands (Harrison/photo)
Upright print from cylinder 1 [15.2.71]

OC25 - 1.5p OCP/PVA, two 4.75mm screen 250 phosphor bands, upright print (Cyl 1) - Deegam 15.1.1 - S.G. U71 - Concise X848 - Stoneham M55
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1½p Black
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fd120b_120c_121b_121c
OCP/PVA, 9.5mm screen 150 B3 phosphor bands (Harrison/photo)
Sideways print from pane DP2 [15.2.71] - DP12 [14.7.71]

OC29 - 1.5p OCP/PVA, two 4.75mm screen 150 phosphor bands, sideways print right (DP2) - Deegam 15.2.1 - S.G. U71 - Stoneham M55c
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OC30 - 1.5p OCP/PVA, two 4.75mm screen 150 phosphor bands, sideways print left (DP2) - Deegam 15.2.2 - S.G. U71 - Stoneham M55c
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