American chewing gum manufacturer and executive in Major League Baseball (1894-1977) who inherited both of those roles as the quiet son of his much more flamboyant father, William Wrigley Jr. Mailing envelope with three postmarks dated to October 1935, with locations reading, “National,” “Champion, Mich.,” and “Ballclub.” Signed neatly in the center in black ink, “Philip K. Wrigley.” In fine condition, with some light diagonal seal-related toning. Encapsulated in a PSA/DNA authentication holder, grading the autograph as "MINT 9."
