The half florin (also known as a leopard) was an attempt by English King Edward III to produce a gold coinage suitable for use in Europe as well as in England.
The half florin was largely based on contemporary European gold coins, with a value of three shillings.
Few specimens have survived of what is often regarded as one of the most beautiful medieval English coins ever produced.
[1] The obverse of the coin shows a leopard with a cloak of the royal arms; the legend is EDWAR D GRA REX ANGL Z FRANC DNS HIB ("Edward, by the Grace of God King of England and France, Lord of Ireland").
The reverse of the coin shows the Royal cross within a quatrefoil, a leopard in each quarter; the legend is DOMINE NE IN FURORE TUO ARGUAS ME ("O Lord, rebuke me not in Thy anger", from Psalm 6).