Great Britain Machins by Adminware

20p sea green

Water-activated gum
First seen: Aug 23, 1988

Harrison & Sons / Photogravure

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Elliptical perf

Yellow vs. blue phosphor bands

Also exists:

20p olive green (Large size)
20p purplish grey
20p black
20p black and cream (Anniversary)
20p black (no cream) (Anniversary)
20p light green
20p light green (Data Matrix Code)

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

ACP		Aug 23, 1988	Sheet	Dex

20p sea green

Elliptical perf
First seen: Dec 7, 1993

Enschede / Gravure

Paper	Other identification	Issue date	Source	Gum
2-band (9.5mm violet) phosphor
OFNP		Mar 26, 1996	Sheet	PVA
2-band (9.5mm yellow) phosphor
OFNP	AY2 phosphor	Dec 7, 1993	Sheet	PVA

Yellow vs. blue phosphor bands

(i-Phone photograph)

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For even more varieties on Machin stamps, check out The Complete Deegam Machin Handbook (simply the best Machin
handbook available anywhere) by Douglas Myall - click for details.

Booklet pane numbers used courtesy the Modern British Philatelic Circle
who publish 'The Bookmark' Catalogue