Paper varieties viewed under long wave light.
MCP = Milky coated paper PVA = Polyvinyl alcohol acetate gum
BCP = Bluish coated paper  
OCP = Original coated paper
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P262 - 1/9 Orange & black, MCP/Arabic, two 4.75mm screen 150 B3 phosphor bands, upright print (Cyl 1A1B) - Deegam PD 14.1.1 - S.G specialised U30(1) - Stoneham M12 - Concise 744
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Two 4.75mm B3 phosphor bands, orange & black shade from sheets cylinder 1A1B [5.6.67]

P264 - 1/9 Bright orange & black, BCP/Arabic, two 4.75mm screen 150 B3 phosphor bands, upright print (Cyl 1A1B) - Deegam PD 14.1.1b - S.G specialised U30(2) - Stoneham M12b - Concise 744Ea
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Two 4.75mm B3 phosphor bands, bright orange & black shade from sheets cylinder 1A1B [5.6.67]

P266- 1/9 Bright orange & black, OCP/PVA, two 4.75mm screen 250 B3 phosphor bands, upright print (Cyl 1A1B) - Deegam PD 14.2.1 - S.G specialised U31 - Stoneham M44 - Concise 744Ev
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Two 4.75mm B3 phosphor bands from sheets cylinder 1A1B [16.11.70]