PhantomSteve: Created page with "{{Stamp |image= |country=Isle of Man |country-code=IM |catalogue=Stanley Gibbons |catalogue-number=10y |variant=Phosphor omitted |issue-title=Queen Elizabeth II regional definitives – Decimal currency |issue-date= |withdrawn-date=5 July 1973 (invalidated in the Isle of Man, subject to transitional acceptance); 7 July 1973 (withdrawn locally); 4 July 1974 (withdrawn from British Philatelic Counters)..."

2026-09-29T08:45:19Z

Created page with "{{Stamp |image= |country=Isle of Man |country-code=IM |catalogue=Stanley Gibbons |catalogue-number=10y |variant=Phosphor omitted |issue-title=Queen Elizabeth II regional definitives – Decimal currency |issue-date= |withdrawn-date=5 July 1973 (invalidated in the Isle of Man, subject to transitional acceptance); 7 July 1973 (withdrawn locally); 4 July 1974 (withdrawn from British Philatelic Counters)..."

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{{Stamp
|image=
|country=Isle of Man
|country-code=[[wikipedia:en:Isle of Man|IM]]
|catalogue=[[wikipedia:en:Stanley Gibbons catalogue|Stanley Gibbons]]
|catalogue-number=10y
|variant=Phosphor omitted
|issue-title=Queen Elizabeth II regional definitives – Decimal currency
|issue-date=
|withdrawn-date=5 July 1973 (invalidated in the Isle of Man, subject to transitional acceptance); 7 July 1973 (withdrawn locally); 4 July 1974 (withdrawn from British Philatelic Counters)
|year=
|face-value=5p
|subject=[[wikipedia:en:Elizabeth II|Queen Elizabeth II]]; Isle of Man [[wikipedia:en:Country definitives|regional definitive]] design
|stamp-type=[[wikipedia:en:Definitive stamp|Definitive]]
|stamp-subtype=[[wikipedia:en:Country definitives|Regional definitive]]
|format=[[wikipedia:en:Postage stamp|Stamp]]
|designer=J Matthews; portrait after a plaster cast by [[wikipedia:en:Arnold Machin|Arnold Machin]]
|printer=[[wikipedia:en:Harrison and Sons|Harrison and Sons]]
|printing-process=[[wikipedia:en:Photogravure|Photogravure]]
|colour=Reddish violet
|dimensions=
|perforation=15 × 14
|watermark=
|paper-gum=Chalk-surfaced paper; paper fluorescence and gum not specified for this error
|other-catalogues=
|fdc-pages=
|notes=Confirmed catalogue-listed error. No separate date of issue is given in the supplied entry; 7 July 1971 is the issue date of the standard SG 10 stamp.
}}

'''SG 10y''' is the phosphor-omitted error of the 5p reddish violet Isle of Man [[wikipedia:en:Country definitives|regional definitive]] depicting [[wikipedia:en:Elizabeth II|Queen Elizabeth II]]. The standard stamp, [[IM-SG-10|SG 10]], was issued on 7 July 1971. The supplied catalogue entry does not give a separate issue or discovery date for the error.<ref name="SG2022">{{Cite Catalogue
|author=Stanley Gibbons
|title=Channel Islands and Isle of Man 2022 Edition Stamp Catalogue
|edition=31st combined edition
|publisher=Stanley Gibbons
|year=2022
|section=Isle of Man — Regional issues
|page=197
|catalogue=Stanley Gibbons
|catalogue-number=10y
|isbn=978-1-911304-89-0
|notes=Place of publication: Ringwood.
}}</ref>

The design is credited to J Matthews, with the portrait after a plaster cast by [[wikipedia:en:Arnold Machin|Arnold Machin]]. [[wikipedia:en:Harrison and Sons|Harrison and Sons]] printed the issue by [[wikipedia:en:Photogravure|photogravure]] on chalk-surfaced paper. Perforation is 15 × 14, and sheets contain 200 stamps (10 × 20).<ref name="SG2022" />

This error lacks the two [[wikipedia:en:Phosphor banded stamp|phosphor bands]] of the standard stamp.<ref name="SG2022" />

The catalogue records invalidation of SG 8–11 for use in the Isle of Man from 5 July 1973, with transitional acceptance for the prepayment of postage on letters from the island until 5 August 1973. It separately records withdrawal from local sale on 7 July 1973 and from British Philatelic Counters on 4 July 1974. The regional stamps remained valid for use in the rest of the United Kingdom at that time.<ref name="SG2022" />

== Related stamps ==

* [[IM-SG-8]] — 2½p bright magenta
* [[IM-SG-8y]] — 2½p bright magenta; phosphor omitted
* [[IM-SG-9]] — 3p ultramarine
* [[IM-SG-10]] — 5p reddish violet
* [[IM-SG-11]] — 7½p chestnut

== References ==

<references />

IM-SG-10y - Revision history