2007 American Eagle One Ounce Silver Proof Coin. Mint – West Point Mint. Mint Mark – W. Diameter – 1.598 inches (40.60 mm). 122 inch (3.10 mm). Composition – 99.9% Silver. Weight – 1.0000 troy oz. Obverse – Adolph A. Weinman’s full-length figure of Liberty in full stride, enveloped in folds of the flag, with her right hand extended and branches of laurel and oak in her left. Reverse – Heraldic eagle with shield, an olive branch in the right talon and arrows in the left.