Paper varieties viewed under long wave light.
BCP = Bluish coated paper PVA = Polyvinyl alcohol acetate gum
OCP = Original coated paper

2d Type 1 value setting

2d Type 2 value setting

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P26 or P27 - 2d Lake brown (Shades), BCP/PVA, type 1 value setting, two 4.75mm screen 150 B3 phosphor bands, head A1, upright print (Cyl 1) - Deegam PD 3.1.1 - S.G specialised U5 - Concise 726 - Stoneham M18
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P26 Llake brown shade from sheets cylinder 1 [5.2.68]

P27 Deep lake brown shade

P30 - 2d Lake brown, BCP/PVA, type 2 value setting, two 4.75mm screen 150 B3 phosphor bands, head B2, upright print (Cyl 6)
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Two 4.75mm B3 phosphor bands, type 2 value setting, head B2 from sheets cylinder 6 [2.2.69]

P31 or P31mp - 2d Lake brown, OCP/PVA, type 2 value setting, two 4.75mm screen 150 B3 phosphor bands, head B2, upright print (Cyl 6)
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P31 Two 4.75mm B3 phosphor bands, type 2 value setting, head B2 from cylinders 5, 6 [2.2.69] - Deegam PD 3.1.2 - S.G specialised U6 - Stoneham M19 - Concise 727
P31mp Phosphor omitted - Deegam PD 3.1.2a - S.G specialised U6 - Stoneham M19ca - Concise 727Ey

P33 - 2d Lake brown, type 2 value setting, BCP/PVA, two 4.75mm screen 250 B3 phosphor bands, head B2, sideways print left (Horizontal coil) - Deegam PD 3.2.1 - Stoneham M19d
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P33 Two 4.75mm B3 phosphor bands, type 2 value setting, head B2, from horizontal coil [4.4.68]
P33s Special offer (Strip of 5 @ £9.00)

P32 - 2d Lake brown, type 2 value setting, BCP/PVA, two 4.75mm screen 250 B3 phosphor bands, head B2, upright print (Vertical coil) - Deegam PD 3.2.2 - Stoneham M19a
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Two 4.75mm B3 phosphor bands, type 2 value setting, head B2 from vertical coil [19.3.69]

P36 - 2d Lake brown, type 2 value setting, OCP/Arabic, 4mm screen 250 B3 phosphor centre band, head B2, sideways print left (Multi value coil) - Deegam PD 3.3.1 - S.G specialised U7 - Stoneham M2 - Concise 728
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4mm B3 phosphor centre band, type 2 value setting, head B2 from GS/GL coils [27.8.69]