Among the newest bullion 24-karat gold coins minted, the American Gold Buffalo was first minted in 2006. Ever since, this stunning coin has been produced yearly, carrying the same design on its obverse and reverse. The American Gold Buffalos are only minted in 1 oz coin increments, except for 2008, where there was a 1/2 oz, 1/4 oz, and 1/10 oz minted.
Due to the Gold Bullion Act of 1985, the US Mint had been producing the American Gold Eagle since 1986. Although the American Gold Eagle offers 1 oz of .999 pure gold, it's still considered only 22-karats. To compete with other Sovereign mints that were also producing 24-karat coins, the US Mint minted the American Gold Buffalo. The American Gold Buffalo is minted at the West Point Mint in New York, although only proof versions actually carry the "W" mint-mark.
