PCP = Phosphor coated paper PVAD = Polyvinyl alcohol acetate dextrin gum
ACP = Advanced coated paper
!
sw20

Bluish violet

SW20 - Scotland 28p Bluish violet, PCP/PVAD, perforation 13¾ X 14 (Waddington/litho) - Deegam S280.1.1 - S.G specialised XSL60 - Stoneham SC69 - Concise S50

From cylinder 1A1B [27.4.83]

SQ38 - Scotland 28p Bluish violet, ACP/PVAD, perforation 14¾ X 14 (Questa/litho) - Deegam S280.2.1 - S.G specialised XSL61 - Stoneham SC102 - Concise S74

From cylinders Q1 - Q2 [27.1.87]
sq39

Slate blue

SQ39 - Scotland 28p Slate blue, ACP/PVA, perforation 14¾ (Questa/litho) - Deegam S280.3.1 - S.G specialised XSL62 - Stoneham SC90 - Concise S75

Perforation 14¾ from cylinders Q1Q1 - Q2Q2 [3.12.91]

SQ40 - Scotland 28p Slate blue, ACP/PVA, perforation 13¾ error (Questa/litho) - Deegam S280.3.2 - S.G specialised XSL63 - Stoneham SC90a - Concise S75a

Perforation 13¾ from cylinders Q1Q1 - Q2Q2 [4.10.92]