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Chris CountsI always figure most cards are created in the off-season, but a little research seems to prove that 1939 Play Balls were created at the beginning of the season. In particular, I notice that Luke Sewell's card shows him with the Indians. According to www.baseball-reference.com, Sewell was released by the Dodgers on 4/20 and signed by the Indians on 4/23. His first series card shows him in an Indians uniform. Meanwhile, Heinie Manush was released by the Pirates on 6/7. His card is also a low number. While this is all speculative, it seems reasonable to conclude that the first series was produced sometime in between 4/23 and 6/7. Gehrig, by the way, came out of the line-up on 5/2 ...