United States of America, Gold 1 Ounce (50 Dollars), 2006, The United States Mint certifies this coin is a proof version of the one ounce American Buffalo Gold Coin, Obv: portrays a profile representation of a native america, the year of minting or issuance and the words "liberty", Rev: a representation of an american buffalo (also known as a bison), denomination below "$ 50", the words "in god we trust" and "E plurubus unum", 31.108g, 32.70mm, UNC.