William IV, King of  United Kingdom of Great Britain and Ireland (1765 - 1837) (Stamp 07)

Quarterly 1 & 4. England; 2. Scotland; 3. Ireland; On an escutcheon of pretence 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 a monarch's crown
Crest: On an imperial crown a lion statant gardant imperially crowned
Order: Garter
Supporters: A lion gardant imperially crowned and a unicorn ducally gorged and chained
Dimensions (height x width): 44mm x 45mm