e/British Fifty Shilling coin

Information
has gloss	eng: A British Fifty Shillings (50/-) coin has only ever been minted once, in the year 1656. It was a milled gold coin weighing 22.7 grams and with a diameter of 30 millimetres. Only eleven examples are known to exist, and they have a current value of approximately £15,000 - £20,000 each.
lexicalization	eng: British fifty shilling coin
instance of	c/British gold coins