Click to expand Tap to zoom 1988-S US Proof American Silver Eagle ASE Coin 1 Ounce W/OGP & COA $109.95 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart 1988-S US Proof American Silver Eagle ASE Coin. Contains 1 Troy Ounce .999 Silver - in OGP W/COA.