New Silver Eagle Reverse Engraver Michael Gaudioso Inks Exclusive Signature Label Deal With NGC American Silver Eagle reverse, has agreed to sign certification labels exclusively for Numismatic Guaranty Corporation (NGC). The addition of Gaudioso is the perfect complement to NGC’s long-standing exclusive signature arrangement with John Mercanti, engraver of the original Silver Eagle reverse. To mark the 35th anniversary of the flagship bullion coins of the United States, the United States Mint is updating the reverse of the Silver Eagle in 2021 as well as that of its companion coin, the American Gold Eagle. This is the first major design change to the American Eagles since the coins were introduced in 1986. Incredibly, both the original reverse and the new reverse will be issued in 2021 — another first for collectors.