The product is a 1 Shilling coin from Great Britain, minted during the reign of King George IV from 1825-1829. This specific coin features a second portrait of the king on one side and a third reverse design. It falls under the Milled era, which lasted from 1816 to 1837, showcasing a style of coinage that was popular during this time period in British history. This piece is a collectible item that holds historical significance and represents a specific period in British coinage.