Effective May 16, 2008
As part of an effort in 1999 to promote the new Sacagawea Dollars, General Mills scattered 5,500 specially-packaged 2000-dated Sacagawea Dollars among 10 million boxes of Cheerios cereal. Five years later, it was discovered that the so-called “Cheerios” Dollars were actually from a different reverse die type. Some experts consider these pattern coins; others have called them “Reverse of 1999”. PCGS has labeled them “Cheerios FS-401”, referring to the source and the reference number from the Fivaz-Stanton “Cherrypicker” guide. Because of the perceived rarity of the Reverse of 1999 and the assumption that all “Cheerios” Dollars bore the Reverse of 1999, the demand for these coins has increased and the coins themselves have become quite valuable.
However, PCGS experts recently opened a sealed “Cheerios” package only to find out that the Dollar contained in the package was . . .
Full story at: Link