A British 1800 silver Threepence (George III), circulated but still in good condition, might fetch anything from £10 to £45 GBP.
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.
Such a coin does not exist. The Threepence was not introduced into the British currency until about 1550.
The British Threepence is part of a redundant currency that was withdrawn and demonetised in 1971. It no longer has an exchange rate with other currencies.
The Royal Mint produced no British Threepences from 1801 to 1833 inclusive.
There were no British 1800 Halfcrowns minted.
There were no British Threepences minted in 1797, bronze or otherwise. Other than Maundy coins, the only Threepences known to have been minted between 1786 and 1833 were the 1792, 1795 and 1800 coins.
British Threepences have been minted for hundreds of years. Any collector value would depend on the year and condition of the coin.
The only British 1831 Threepence issued was the Maundy Threepence. A British 1831 Maundy Threepence (FDC), uncirculated and in absolute mint condition could fetch up to £40 GBP. If it has been circulated but still in good condition, it might fetch up to £20 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A British 1978 (silver) Maundy Threepence, uncirculated and in absolute mint condition could fetch up to £20 GBP. A reputable coin dealer will be able to give a more accurate valuation.
I cannot find any reference to such a coin . Please check.
The dodecagonal brass British Threepence ceased to be legal tender on 31-Aug-1971.
A British 1852 Threepence (issued for colonial use only), circulated but still in good condition, might fetch anything from £60 to £500 GBP. A reputable coin dealer will be able to give a more accurate valuation.
Queen Elizabeth I, Third Coinage A British 1570 Threepence, circulated but still in good condition, might fetch anything from £35 to £135 GBP. A reputable coin dealer will be able to give a more accurate valuation.