50th Anniversary Marine Corps American Eagle One Ounce Silver Proof Coin – SEALED. Celebrate the 250th anniversary of the US Navy with this stunning American Eagle one ounce silver proof coin from the U. Made with 0.999 fineness silver, this coin features a striking proof finish and contains 1 oz of precious metal content. Perfect for collectors or investors looking for a special addition to their collection, this limited edition coin is a symbol of American pride and craftsmanship. It is a unique and valuable piece that will surely be a cherished item for years to come.