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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P231 - 1/- Violet, MCP/Arabic, two 4.75mm screen 150 B3 phosphor bands, upright print (Cyl 3) - Deegam PD 12.1.1 - S.G specialised U25(1) - Stoneham M10 - Concise 742
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Two 4.75mm B3 phosphor bands, violet shade from sheets cylinder 3 [5.6.67]

P235 - 1/- Bright violet, BCP/Arabic, two 4.75mm screen 150 B3 phosphor bands, upright print (Cyl 11) - Deegam PD 12.1.1a - S.G specialised U25(2) - Concise 742Ea
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Two 4.75mm B3 phosphor bands, bright violet shade from sheets cylinder 11 [?.6.68]

P238 - 1/- Violet shade, BCP/PVA, two 4.75mm screen 150 B3 phosphor bands, upright print (Cyl 11) - Deegam PD 12.2.1 - S.G specialised U26 - Stoneham M41 - Concise 742Ev
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Two 4.75mm B3 phosphor bands, violet shade from sheets cylinder 11 [26.4.68]

P239 or P239bmp - 1/- Bright violet shade, OCP/PVA, two 4.75mm screen 150 B3 phosphor bands, upright print (Cyl 11)
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P239 Two 4.75mm B3 phosphor bands, bright violet shade from sheets cylinder 11 [?.2.70]
P239bmp Phosphor omitted, bright violet shade - Deegam PD 12.2.1a - S.G specialised U26a - Stoneham M41a

P242 - 1/- Bright violet, OCP/PVA, two 4.75mm screen 250 B3 phosphor bands, upright print (Cyl 11) - Deegam PD 12.3.1
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Two 4.75mm B3 phosphor bands, bright violet shade from sheets cylinder 11 [?.2.70]