Originally, both the press release and apparently the COA from the U.S. Mint announced that the reverse design included Jim and Huck from the Adventures of Tom Sawyer. This error seemed to pass a lot of people who read the books, including me. Jim, who was Miss Watson’s slave who befriended Huckleberry Finn, appeared in the Adventures of Huckleberry Finn. Oops!
Apparently, someone forgot to proof read everything and the COAs were printed with the same information. Rather than distribute the wrong COA, which would have been interesting, the U.S. Mint had them reprinted. Citing an inventory issue, they delayed the sale of the silver dollar. It was not the inventory of coins that was the problem. It was the inventory of the complete package including the COA that caused the delay.
Packaging errors usually do not bring a premium. While they can be amusing, collectors have treated packaging errors as a nuisance. This would have been a fun error to keep around.
As an aside, I noticed that the 2016-W Mark Twain $5 Gold Proof Coin is listed as “Currently Unavailable” on the U.S. Mint’s website. The uncirculated coin is still available. Although there is a mintage limit of 100,000 gold coins regardless of strike type, there is no indication if this is the result of a sell out or a lack of inventory. Stay tuned.