Featured in this collection are the autographed baseballs of all 27 Yankees World Series championships, starting in 1923 through 2009.  Not every ball has the signature of every player on the roster, but they do contain the majority of them, including the high profile ones.  Many of the balls contain signatures of the coaches and managers as well.  Once you click on one you can enlarge the view and rotate the ball.  Each rotation will show every signature found on it.