1970s-80s Major League game issued cap collection features 13 pro model hats that were not available to the public and feature some rare styles including: Cleveland Indians, (2) Minnesota Twins, Kansas City Royals, (2) Detroit Tigers, Boston Red Sox, New York Yankees, (2) Seattle Mariners, Milwaukee Brewers, and (2) Chicago White Sox. None are identified with player's numbers and only two or three show any use, rest are unused.