1954 New York Yankees Stamped signature souvenir baseballA 1954 New York Yankees Stamped signature souvenir baseball is worth about $30.-$75. in excellent -near/mint condition. Souvenir Baseballs, with Stamped Autographs were Sold at ballparks across the country. These souvenir baseballs have been a fan favorite for decades, and is one of the first souvenirs kids get when they go to their first Major League Baseball game. Most of them have been used to submission, or the signatures faded over the years. But the few that make it through the years are desirable.