A British 1640 silver Threepence (Charles [1]), circulated but still in good condition, might fetch anything from £45 to £150 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.
Chat with our AI personalities