Paper varieties viewed under long wave light.
PDP numbers are the copyright of the MBPC and are used with their permission.
BCP = Bluish coated paper PVA = Polyvinyl alcohol acetate gum
OCP = Original coated paper
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P165 or P165mp - 5d Slate blue shade, BCP/PVA, two 4.75mm screen 150 B3 phosphor bands, head A1, upright print (Cyl 1)
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P165 Two 4.75mm B3 phosphor bands from sheets cylinder 1 [1.7.68] - Deegam PD 6.1.1 - S.G specialised U17 - Stoneham M33 - Concise 735
P165mp Phosphor omitted - Deegam PD 6.1.1a - S.G specialised U17 - Stoneham M33a- Concise 735Ey

P177u or P177i - 5d Bright blue shade, BCP/PVA, two 4.75mm screen 150 B3 phosphor bands, head B2 (PDP8 (R2) - Deegam PD 6.1.3
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P177u Upright print from booklet pane PDP8 (R2) [16.9.68]
P177i Inverted print from booklet pane PDP8 (R2) [16.9.68]

P169 or P169mp - 5d Slate blue shade, OCP/PVA, two 4.75mm screen 150 B3 phosphor bands, head A1, upright print (Cyl 1)
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P169 Two 4.75mm B3 phosphor bands, original coated paper from sheets cylinder 1 [1.7.68]
P169mp Phosphor omitted, original coated paper from sheets cylinder 1 [1.7.68]

P178u or P178i - 5d Bright blue shade, OCP/PVA, two 4.75mm screen 150 B3 phosphor bands, head B2 (PDP8 (R2) - Deegam PD6.1.3 - Stoneham M34b
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P178u Upright print from booklet pane PDP8 (R2) [16.9.68]
P178i Inverted print

P187u or P187i - 5d Deep blue shade, OCP/PVA, two 4.75mm screen 150 B3 phosphor bands, head B2 (PDP8 (R3) - Deegam PD 6.1.3
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P187u Upright print from booklet pane PDP8 (R3) [1.5.69]
P187i Inverted print

P173 or P173mp - 5d Slate blue shade, OCP/PVA, two 4.75mm screen 150 B3 phosphor bands, head B2, upright print (Cyl 7)
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P173 Two 4.75mm B3 phosphor bands, head B2 from sheets cylinder 7 [?.3.69] - Deegam PD 6.1.5 - Stoneham M34
P173mp Phosphor omitted - Deegam PD 6.1.5a - Stoneham M34a Out of stock (£3)

P186 - 5d Deep blue shade, OCP/PVA, two 4.75mm screen 150 B3 phosphor bands, head B2, upright print (Cyl 10) - Deegam PD 6.1.6 - Stoneham M34
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Two 4.75mm B3 phosphor bands, head B2, deep blue shade from cylinder 10 [?.5.69]

P191 - 5d Blue, OCP/PVA, two 4.75mm screen 150 B3 phosphor bands, ink screened border, head B2, upright print (Cyl 15) - Deegam PD 6.1.6b
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Two 4.75mm B3 phosphor bands, head B2, ink screened border from cylinder 15 [9.4.70]

P176 - 5d Blue, OCP/PVA, two 4.75mm screen 250 B3 phosphor bands, head B2, sideways print left (Horizontal coil) - Deegam PD 6.2.1 - Stoneham M34e
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Two 4.75mm B3 phosphor bands, head B2 from AF horizontal coil [9.9.68]

P189 - 5d Blue, OCP/PVA, two 4.75mm screen 250 B3 phosphor bands, head B2, upright print (Cyls 11, 13) - Deegam PD 6.2.2
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Two 4.75mm B3 phosphor bands, head B2 from cylinder 11 [?.4.69] - Cylinder 13 [3.12.70]

P183 - 5d Blue, OCP/PVA, two 4.75mm screen 250 B3 phosphor bands, head B2, upright print (PDP13, 15) - Deegam PD 6.2.3 - Stoneham M34f
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Two 4.75mm B3 phosphor bands, head B2 from booklet panes PDP13, 15 [1.12.69]