Upper Deck says its upcoming Premier Baseball product, which goes live March 24, will feature one of the highest concentrations of the company’s Signs of History insert set. The set, which is spread across all of the company’s 2008 baseball releases, features cut signatures of every U.S. president. The cards are available through an exchange program. There are also dual-cut versions that feature signatures of presidents and First Ladies, and a quad-cut card featuring signatures of every president depicted on Mt. Rushmore. “Our acquisitions team and authenticators have been working overtime in preparation for this project,” said Jason Masherah, Upper Deck’s baseball brand manager.