Great Britain Machins by Adminware

28p slate blue

Water-activated gum
First seen: Sep 10, 1991

Harrison & Sons / Photogravure

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Northern Ireland
Scotland
Wales

Also exists:

28p bluish violet
28p sand

Paper	Other identification	Issue date	Source	Gum	Pic?	Checklist	Want?

ACP		Sep 10, 1991	Sheet	Dex

28p slate blue

Northern Ireland
First seen: Dec 3, 1991

Questa / Lithography

Paper	Symbol Type	Other identification	Issue date	Source	Gum	Pic?	Checklist	Want?

ACP	Symbol 2b		Dec 3, 1991	Sheet	PVA

28p slate blue

Scotland
First seen: Dec 3, 1991

Questa / Lithography

Paper	Symbol Type	Other identification	Issue date	Source	Gum

ACP	Symbol 2		Dec 3, 1991	Sheet	PVA
ACP	Symbol 2	Perf. 13½x14	Oct 4, 1992	Sheet	PVA

Stamps are perforated 14¾x14 unless otherwise noted.

28p slate blue

Wales
First seen: Dec 3, 1991

Questa / Lithography

Paper	Symbol Type	Other identification	Issue date	Source	Gum	Pic?	Checklist	Want?

ACP	Symbol 2		Dec 3, 1991	Sheet	PVA

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For even more varieties on Machin stamps, check out The Complete Deegam Machin Handbook (simply the best Machin
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Booklet pane numbers used courtesy the Modern British Philatelic Circle
who publish 'The Bookmark' Catalogue