William and Mary Five Guinea coins were minted in every year from 1691 to 1694 inclusive.
A British 1691 to 1694 gold Five Guinea coin (KW III and QM), (depending on Regnal year) circulated but still in good condition, it might fetch anything from £2,000 to £17,500 GBP.
A reputable coin dealer will be able to give a more accurate valuation.
NOTE - The reverse of these coins is upside down to the obverse. This is normal.
His Imperial Majesty reigned for 26 years (1910-1936). He was on coins from Great Britain, Jamaica, Bermuda, India, Ceylon, Malaya, South Africa, Egypt, Guyana, Gold Coast, The British Honduras, New Zealand, Australia, Canada, Hong Kong,and scores of other countries in between.Let's just say that thereare at 25 different currencies that included him on their coins. There were 26 years to choose from that King George was on these coins. Every currency had at least seven different kinds of coins per year. Most importantly, the value would depend on the condition of the coin. So, to value the coin I would have to take all of the previous points into consideration. Do you understand I have a 1-in-500 chance of getting the value correct? You need to add a LOT of information.
The larger pre-1991 5 Pence coins were withdrawn from circulation and demonetised in 1991. So, unless they are part of a Proof or uncirculated mint set or are individual Proof or uncirculated coins and in absolute mint condition, they have little or no value.
The British gold Five Guinea coin was last issued in 1777 as a Proof FDC coin.
The Guinea was replaced with the Sovereign in 1817.
There were no Five Pound or Quintuple Sovereigns minted in 1885.
British gold coins have been minted for over a thousand years. In 1786, the British gold coins in circulation were the Five Guinea, Two Guinea, Guinea and Half-Guinea coins. The Guinea was equal to 21 Shillings.
There was no 1908 British Crown (Five Shilling) minted.
There was no 1956 British Crown (Five Shillings) minted.
There was no 1963 British Crown (Five Shillings) minted.
There were no 1823 British Crowns (Five Shillings) minted.
There was no British 1907 Crown (Five Shillings) minted.
There was no 1923 British Crown (Five Shillings) minted.
There was no British 1886 Crown (Five Shillings) coin minted.
There was no British 1846 Crown (Five Shillings) coin issued.
The Royal Mint produced no British Five Pound coins from 1938 to 1979 inclusive.
There was no 1970 British Crown (Five Shilling) coin minted. The last British predecimal Crown (Five Shilling) coin to be minted was in 1965.
There were no British Crown (Five Shilling) coins issued from 1903 to 1926.