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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OC41 - 2.5p Magenta, OCP/PVA, 4mm screen 250 B3 phosphor centre band, sideways print right (Horizontal coil) (Harrison/photo) - Deegam 25.1.1 - Stoneham M57e
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4mm B3 phosphor centre band from horizontal coil [15.2.71]

OC37 or OC38 - 2.5p Magenta, OCP/PVA, 4mm screen 150 B3 phosphor centre band, low set thin value, upright print (Cyls 5, 6, 7) (Harrison/photo)
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OC37 4mm B3 phosphor centre band from cylinders 5, 6, 7 [15.2.71] - Deegam 25.2.1 - S.G specialised U86 - Stoneham M57 - Concise X851
OC38 Phosphor omitted - Deegam 25.2.1a - S.G. U86a - Concise X851Ey - Stoneham M57a

OC37t - 2.5p Magenta, OCP/PVA, 4mm screen 150 B3 phosphor centre band plus two vertical bars training stamp
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4mm B3 phosphor centre band plus two black vertical bars training stamp from cylinder 5 [15.2.71]

OC40 - 2.5p Magenta, OCP/PVA, 4mm screen 150 B3 phosphor centre band, high set thin value, upright print (Cyl 8) (Harrison/photo) - Stoneham M57b
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High set thin value from cylinder 8 [15.2.71]

OC39 - 2.5p Magenta, OCP/PVA, 4mm screen 150 B3 phosphor centre band, thin value, upright print (Vertical coil) (Harrison/photo) - Deegam 25.2.2 - Stoneham M57d
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4mm B3 phosphor centre band from vertical coil [15.2.71]

OC43 or OC44a - 2.5p Magenta, OCP/PVA, 4mm screen 150 B3 phosphor centre band, low set thick value (DP4, 5, 8) (Harrison/photo) - Stoneham M57f
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OC43 Upright print from booklet panes DP4, DP5, DP8 [15.2.71] - Deegam 25.2.3
OC44a Inverted print - Deegam 25.2.4

OC44 or OC45 - 2.5p Magenta, OCP/PVA, 4mm screen 150 B3 phosphor centre band, high set thick value (DP4, 5, 8) (Harrison/photo)
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OC44 Upright print from booklet panes DP4, DP5, DP8 [15.2.71]
OC45 Inverted print - Deegam 25.2.4a

OC48 or OC48a - 2.5p Magenta, OCP/PVA, B3 phosphor left band (DP9) (Harrison/photo) - S.G specialised U91 - Stoneham M58
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OC48 Upright print from booklet pane DP9 [17.2.71] - Deegam 25.3.1
OC48a Inverted print - Deegam 25.3.2