The British Groat, as distinct from a Maundy Fourpence, was minted irregularly from 1763 to 1800, and not at all from 1801 to 1820.
A British silver Groat (Fourpence)(George III), circulated but still in good condition, it might fetch anything from £7 to £45 GBP.
The 1765 coin might get substantially more and is one to look out for.
The values quoted are the best possible for the best specimens in their grades, but may be significantly lower due to varying demand for the coin and the prevailing economic climate. A reputable coin dealer will be able to give a more accurate valuation based on inspection of the coin.
$30
King George IV did not take the throne until 1820 and there was no 1773 British Penny minted.
George III
Value of British banknote during reign of King George III - dated October 1773 ?
King George was the British king.
Such coins do not exist. King George IV died in 1830. King George V was king in 1931. British 1931 coins do not have any especially great (give up your job) value, but if in reasonably good condition, could get a few pounds.
A 1940 King George WHAT?
Such a coin does not exist. King George I died in 1727 and there were no British Pennies minted from 1798 to 1805 inclusive.
who was the british monarch at the time of the american revolution
He was British
British Parliament and King George III
British Halfpennies have not been made from silver for hundreds of years. If you have a 1939 British silver halfpenny, it is because somebody plated it, and it has no value. A halfpenny made from silver would be worth about £20 GBP just because of the silver content.