20p sea green

Water-activated gum
First seen: Aug 23, 1988

 

Harrison & Sons / Photogravure


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PaperOther identificationIssue dateSourceGum
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ACPAug 23, 1988SheetDex

20p sea green

Elliptical perf
First seen: Dec 7, 1993

 

Enschede / Gravure

PaperOther identificationIssue dateSourceGum
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2-band (9.5mm violet) phosphor
OFNPMar 26, 1996SheetPVA
2-band (9.5mm yellow) phosphor
OFNPAY2 phosphorDec 7, 1993SheetPVA

Yellow vs. blue phosphor bands

(i-Phone photograph)



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

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