1904 $20 -- Struck 15% Off Center -- MS63 PCGS. The 2010 Whitman reference 100 Greatest U.S. Error Coins ranks this remarkable double eagle as #7, the highest rank of any off-center error. The authors (Nicholas P. Brown, David J. Camire, and Fred Weinberg) state that the coin was discovered in Geneva, Switzerland, in the early 1990s. It actually first surfaced with the late Victor Goudoury of Monte Carlo at the 1990 ANA in Seattle. It was the only U.S. coin set aside for Marc Emory of Heritage in a collection of world gold. The collection had apparently been buried for decades, a relatively common occurrence during World War II. All the coins in the collection showed evidence of rust, clay, or other debris on their surfaces. It is the only known off-center double eagle.