1806 George III Third 1/3 Guinea Great Britain Gold Coin. Please grade yourself from the pictures, take any grading by us only as a guide. We would ask that if you are looking to return an item that you message us within 7 days of receiving the item. The item "1806 George III Third 1/3 Guinea Great Britain Gold Coin" is in sale since Thursday, March 30, 2017. This item is in the category "Coins\Coins\British\Early Milled (c.The seller is "redbank_coins" and is located in Derby, Derbyshire. This item can be shipped worldwide.