Also, most consider Stan Coveleski's rookie issue to be the W520 and/or W522 because there are no earlier cards of him in a
major league uniform. That said, there are no other 1920 issues of Coveleski anyway (with the exception of a 1920 Cleveland Team PC), but it does open the door for calling his 1921-23 E220 National Caramel and 1921 Exhibits cards as rookies now. Nothing like having your "rookie" card image taken when you are 31 years old and a Pennant winner!
Exciting stuff!
For me, I prefer this
minor league postcard from 1909, which includes Mr. Coveleski while with the Lancaster Red Roses:

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http://imageevent.com/derekgranger
Working on the following:
HOF "Earliest" Collection (Ideal - Indiv): 250/346 (72.3%)
1914 T330-2 Piedmont Art Stamps......: 116/119 (97.5%)
Completed:
1911 T332 Helmar Stamps (180/180)
1923 V100 Willard's Chocolate (180/180)