Post office paper = creamy paper/gum. Bradbury paper = white paper/gum
Thick horizontal linesPost Office paper/PVA [5.3.69]
HV4 Post Office chalky paper [17.6.70] - Deegam L50.1.1 - S.G specialised UC8 - Stoneham H27 - Concise 831HV5 Post Office uncoated paper [17.6.70] - Deegam L50.1.1a - S.G specialised UC8a - Stoneham H27aHV6 Phosphorised paper [1.2.73] - Deegam L50.2.1 - S.G specialised UC9 - Stoneham H27bHV7 Bradbury paper [20.2.74] - Deegam L50.3.1 - S.G specialised UC10 - Stoneham H30
Thick vertical linesPost Office paper/PVA [17.6.70]