2021W American Silver Eagle PROOF With Box and C. The obverse (heads) of the coin is the iconic full-length Walking Liberty designed by Adolph A. The reverse (tails) bears engraver John Mercanti’s majestic heraldic Eagle with Shield. The “W” mint mark denotes the West Point Mint. This true work of art arrives in a sturdy U. Mint box and an elegant blue velvet, satin-lined presentation case with official Certificate of Authenticity from the U. Contains 1 Troy oz. (31.103 grams) of. 40.60 mm/1.598 inch in diameter.