American Eagle 20th Anniversary Silver Coin Set. Mint – West Point. Mint Mark – W. Diameter – 1.598 inches (40.60 mm). 122 inch (3.10 mm). Composition – 99.9% Silver. Weight – 1.0000 troy oz. 117 inch (2.98 mm). Condition – Reverse Proof. Mint Mark – P. Obverse Design – 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 Design – Heraldic eagle with shield, an olive branch in the right talon and arrows in the left.