A British 1797 copper Twopence (George III)(41 mm diameter, aka a "Cartwheel coin"), uncirculated and in absolute mint condition could fetch up to £1,400 GBP (it would have to possess close to or full original red mint lustre to command this price). If it has been circulated but still in good condition, it might fetch anything from £40 to £400 GBP.
A British 1797 Twopence (Copper Proof FDC) could fetch up to £900 GBP.
A British 1797 Twopence (Bronzed Proof FDC) could fetch up to £800 GBP.
A British 1797 Twopence (Silver Proof FDC) could fetch up to £8,000 GBP.
A British 1797 Twopence (Gold Proof FDC) could fetch up to £15,000 GBP.
A British 1797 Twopence (Gilt copper FDC) could fetch up to £1,750 GBP.
NOTE - The reverse of these coins is upside down to the obverse. This is normal.
Remember, these coins were struck in large numbers 722,160 for the standard copper 'currency' coin. The proofs are very rare and highly sought after.
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.
There were no British Twopences produced by the Royal Mint in 1801.
A British 1975 silver Maundy Twopence (QE II), in absolute mint condition could fetch up to £20 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A British 1967 silver Maundy Twopence (QE II), uncirculated and in absolute mint condition could fetch up to £12 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A British 1940 50% silver Maundy Twopence (George VI)(Proof FDC), uncirculated and in absolute mint condition could fetch up to £12 GBP. A reputable coin dealer will be able to give a more accurate valuation.
The British issued "cartwheel" Pennies and Twopences in 1797 only.
A British 1900 silver Maundy Twopence (QV), uncirculated and in absolute mint condition could fetch up to £12 GBP. If it has been circulated but still in good condition, it might fetch up to £6 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A British 1907 silver Maundy Twopence (KE VII), uncirculated and in absolute mint condition could fetch up to £10 GBP. If it has been circulated but still in good condition, it might fetch up to £6 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A British 1936 silver Maundy Twopence (KG V), uncirculated and in absolute mint condition could fetch up to £15 GBP. If it has been circulated but still in good condition, it might fetch up to £10 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A British 1932 silver Maundy Twopence (George V), uncirculated and in absolute mint condition could fetch up to £15 GBP. If it has been circulated but still in good condition, it might fetch anything up to £10 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A British 1920 silver Maundy Twopence (KG V), uncirculated and in absolute mint condition could fetch up to £12 GBP. If it has been circulated but still in good condition, it might fetch anything up to £7 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A British 1912 silver Maundy Twopence (KG V), uncirculated and in absolute mint condition could fetch up to £12 GBP. If it has been circulated but still in good condition, it might fetch anything up to £7 GBP. A reputable coin dealer will be able to give a more accurate valuation.
If you refer to the GEORGE III 1797 "Cartwheel" Penny and Twopence, they are both made from copper and are of almost identical appearance, the Penny is a little over 30 mm in diameter and the Twopence is much larger at about 40 mm in diameter.