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. Key contributors in the signature series market USA Edmund C. Moy, 38th Director of the United States Mint 2006-2011 PCGS/NGC Anna Escabedo Cabral 42nd Treasurer of the United States 2005 – 2009 NGC Michael Castle The Coinage Congressman 1993-2011 NGC Thomas S. Cleveland U.S. Mint coin designer 2004 – 2014 PCGS Kenneth Bressett Editor of the United States Red Book/Numismatic researcher 1962-2017 NGC John Mercanti U.S. Mint U.S. Mint Chief coin engraver 1974-1991 PCGS/NGC John Boehner The 53rd speaker of the United States House of Representatives from 2011 to 2015 NGC Paul C. Balan U.S. Mint coin designer 2009-2019 PCGS World Coins Susanna Blunt Artist engraver Royal Canadian Mint Ed Harbuz Mint Director South African Mint – Perth Mint Australia Cheng Chao China Mint