Clean and sharp card from the difficult W502 issue, the "One Bagger - Hold What You Got" printing on the reverse from bottom to top.  About half the known specimens from the W502 issue have similar printing on the reverse, permitting a baseball game to be played by drawing cards from a pile with "baserunners" moving station-to-station based on the results printed on the card reverse.  Blank-backed cards represent about half the known specimens, likely outs in the game.  In the case of this card of Grover Cleveland Alexander, the AUTHENTIC grade assigned by PSA may be due to a slight trim, though the card appears to measure properly and the slight tilt lends credence to the possibility of a natural cut.