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fkwR315's are listed in the 2008 SCD as being from 1929-30, but if O'Doul is shown with NY NL it should be noted that the R315's also might have came out in 1928 (the 2003 SCD listed the R315's as 1928)
These 2 are also from 1929 but show him with Phil NL.
But like others said, the Zeenut cards are much earlier so its no big deal which card was his first in the Majors.
1929 W553
1929 R316