Posted By:
ty_cobbAdvertisements for the T206 set appeared
in the Sporting Life 1909. 10 cards from
the 150 series are shown in an early July issue.
A new ad appears in August, all 150 series again,
this time one of the cards shown is Honus Wagner.
First ads for the 350 series appear in late August
in the New Orleans papers for Hindu cigarettes,
this is the first depiction of Southern Leaguers.
I would speculate the 350 series was first issued
late August/early September 1909.