999 Silver 1 Oz Proof Medal US Royal Mint OGP Box COA. EXACTLY AS IT CAME FROM THE US MINT! THIS ONE (1) TROY OUNCE. 999 PURE SOLID SILVER MEDAL IS AN HISTORIC COLLABORATION BETWEEN THE US MINT, AND THE ROYAL MINT OF BRITAIN. COMES AS SHOWN, WITH ORIGINAL GOVERNMENT PACKAGING (OGP) AND COA.