23p values

PCP = Phosphorised coated paper

PVAD (Dextrin) = Polyvinyl alcohol acetate dextrin gum

 ACP = Advanced coated paper  
!
pc134

PC134 - 23p pastel red, PCP1/PVAD, upright print (Cyl 1) (Harrison/photo) - Deegam 230.1.1 - S.G specialised U283 - Stoneham M339 - Concise X965

From cylinder 1 [30.3.83]
ac126

AC126 - 23p light green, ACP/PVAD, upright print (Cyl 6) (Harrison/photo) - Deegam 230.2.1 - S.G specialised U284 - Stoneham M407 - Concise X966

From cylinder 6 [23.8.88]