I found reference to the Obak baseball cards in an issue of the United States Tobacco Journal from 1909.
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| United States Tobacco Journal – October 9, 1909 from Google Books |
I found several different advertisements from 1910 that featured the Obak brand, but I haven’t found one for the smokes featuring cards.
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| San Francisco Chronicle – June 8, 1910 from GenealogyBank.com |
Here’s an example of the T212 Obak cards.
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| Obak T212 – W. Hogan from the Library of Congress |
A nickel a pop? I’d buy them by the carton. And I don’t smoke.
SABR's Baseball Cards Research Committee 