As far as World Series press pins go, they don't come any finer than this 1921 specimen from the last year of the Best-of-Nine format. The New York Giants outlasted the crosstown rival Yankees, five games to three, and this NRMT pin features two crossed bats and baseball figures and "1921" in the center. Around the circumference are the words: WORLD SERIES POLO GROUNDS NEW YORK PRESS. Classic.