The 
Florin or 
Double Leopard was an attempt by 
English king 
Edward III to produce a gold coinage suitable for use in Europe as well as in England (see also 
Half Florin or Leopard and 
Quarter Florin or Helm). The florin, based on a French coin and ultimately on coins issued in 
Florence, Italy, was a standard coin widely used internationally, with a value of 
six shillings. Unfortunately the gold used to strike the coins was overvalued, resulting in the coins being unacceptable to merchants, and the coins were withdrawn after only a few months in circulation, in August 
1344, to be melted down to produce the more popular 
gold Noble. This is unfortunate as few specimens survived of what is often regarded as one of the most beautiful medieval English coins ever produced.
The obverse of the coin shows the King enthroned beneath a canopy, with two leopards' heads at the sides (the leopard being the heraldic "lion" on the English coat of arms); the legend is EDWR 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 spandrel; the legend is IHC TRANSIENS PER MEDIUM ILLORUM IBAT (But Jesus passing through their midst went His way).
For the nineteenth and twentieth century Florin, please click 
here.
For other denominations, please go to 
British coinage.
 
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