The Royal Mint produced no Penny or Halfpenny coins from 1808 to 1824 inclusive.
Due to Britains ongoing expenses with various wars in the late 18th and early 19th centuries, there were very few silver or copper coins minted, subsequently there were a great many privately minted tokens and counterfeit coins produced.
To get an estimate of value on a privately minted token, you need to provide the details of the inscription on the token.
The value of an 1820 penny can vary significantly based on its condition, mint mark, and rarity. Generally, an 1820 British penny in average condition may range from a few dollars to over $100 for well-preserved examples. For specific valuations, it's best to consult a coin dealer or a numismatic guide, as prices can fluctuate with market demand.
There were no British Farthings minted from 1808 to 1820 inclusive.
There were no British "v" pence coins minted in 1820, or ever.
King George IV did not take the throne until 1820 and there was no 1773 British Penny minted.
The British Half Penny was no longer issued after 1984.
The British Half Penny was no longer issued after 1984.
There is no record of a British 1852 Penny having been minted.
The British New Penny coin was first issued in 1971.
A 1820 penny - aka - Coronet Large Cent - was minted in 4 different varieties: 1820, 1820 (large date with a curl top 2), 1820 (large date with plain top 2), and a 1820 (small date with a curl top 2). All these coins in good condition (G4) are worth from $30 to $50.00.
Assuming average circulated condition, about $5.00
There was no 1850 British Penny minted.
Modified coins have no collector value.