Large-format poster for International Baseball School, essentially an advertisement to purchase eight instructional booklets, a patch, a membership card "the right to submit questions" and an entry into a sweepstakes to win a trip to the baseball school in St. Petersburg, Florida.  The "faculty" listed on the poster includes future Hall of Famers Luke Appling, Earl Averill, Mickey Cochrane, Jimmie Foxx, Charles Gehringer, Hank Greenberg, Lefty Grove, Gabby Hartnett, Billy Herman, Carl Hubbell, Joe Medwick, Mel Ott, Lloyd Waner and Paul Waner, among others.  The handsome ad folds into quarters to be mailed in a 9" x 12" envelope, and aside from the aforementioned folds, and a few added wrinkles, is in excellent condition.