The American Gold Eagle was first released in 1986, wherein the Proof Gold Eagle also made it's debut of 1 oz coins. It wasn't until 1988, that the Proof American Gold Eagle Coin became available in four sizes, like it's BU counterpart: 1 oz, 1/2 oz, 1/4 oz, and 1/10 oz. Besides the obvious difference, between the two finishes of the Brilliant Uncirculated and Proof American Gold Eagles, another major difference is the packaging of the coins.
