There were no British Sixpences (half Shilling) minted from 1788 to 1815 inclusive.
There was very little silver and copper coinage minted during this period due to Britains ongoing and costly wars.
You may have a privately issued or counterfeit coin. Counterfeiting was rife during this period due to the shortage of official coinage.
The 1807 british penny is 34 millimeters in diameter, and contains 18.9 grams of copper.
The 1807 Abolition of Slavery 2 pound coin was issued in 2007 by the British Royal Mint to commemorate the bicentenary of the abolition of the transatlantic slave trade in 1807. It is a circulating commemorative coin and is legal tender with a face value of 2 pounds. The value of the coin as a collectible can vary depending on its condition and rarity, but typically it is worth its face value if used as currency.
british and french
USS Chesapeake
William Dalrymple - British Army officer - died in 1807.
Please ask one question at a time using the format - "What is the value of a 1770 British Halfpenny". George III halfpennies were only issued in 1770 to 1775, 1799, 1806 and 1807.
the trading of slaves
Depends on condition,which model.
in England by Sir Humphry Davy, a British scientist, in 1807
the trading of slaves
outlawed
Please post a new, separate question with the coin's country of origin. If it says ONE CENT, it's a US Large Cent. If it says ONE PENNY, it's a British penny.