Signature Series coins are certified coins whose labels have been hand-signed by someone with an interesting personal connection to a particular coin. Signature Series coins allow collectors to customize their sets, enhance the quality of presentation, and add a level of exclusivity and collectability.
Michael Castle, “The Coinage Congressman”. was a two-term Governor of Delaware and near twenty-year member of the US House of Representatives. He is directly responsible for some of the most important and popular modern U.S. coins. While in Congress Mike Castle introduced legislation that authorized a number of important modern U.S. coin programs. He authored and / or sponsored bills that resulted in the transformative American Gold Buffalo coins, Americas first 24- karat gold coins, the American Platinum Eagle series, 50 States Quarters Program, the Sacagawea Dollar, the Presidential Dollar Series and numerous commemoratives. Castle's fifth great-grandfathers were founding fathers Benjamin Franklin and Daniel Carroll. His signature is one of the best known and most sought after in all of numismatics.