George III, King of Great Britain and Ireland (until 1801) then the United Kingdom and Ireland (1738 - 1820) (Stamp 13)

Owner:
Arms:
Quarterly 1 & 4. England; 2. Scotland; 3. Ireland; overall on an escutcheon Tierced in pairle reversed: Two lions passant gardant (Brunswick); Semy of hearts a lion rampant (Lunenberg); A horse courant (Saxony); overall on an escutcheon gules the crown of Charlemagne (High Treasurer of the Empire); The whole surmounted of an electoral bonnet gules turned up ermine
Crest: On an imperial crown a lion statant gardant imperially crowned
Badge: The rose and the thistle
Motto: Dieu et mon droit
Order: Garter
Supporters: A lion gardant imperially crowned and a unicorn ducally gorged and chained
Dimensions (height x width): 108mm x 100mm
Usage: as King of Great Britain (1801-1816)
Escutcheon of Pretence: Gules the crown of Charlemagne (High Treasurer of the Empire)
Quarterings: 1 & 4. England; 2. Scotland; 3. Ireland; overall on an escutcheon Tierced in pairle reversed: Two lions passant gardant (Brunswick); Semy of hearts a lion rampant (Lunenberg); A horse courant (Saxony); overall on an escutcheon gules the crown of Charlemagne (High Treasurer of the Empire); The whole surmounted of an electoral bonnet gules turned up ermine

Sources