T206 is the collector designation for the 1909–1911 White Border baseball card set produced by the American Tobacco Company and distributed in cigarette packs. The T prefix follows Jefferson Burdick American Card Catalog classification system. The 524-subject series is the largest and most collected pre-war American baseball card set, and includes the famous Honus Wagner card. Different reverse advertisement variations (Piedmont, Sweet Caporal, Hindu, Polar Bear, Old Mill, Carolina Brights) command different premiums.

T206 is the catalogue designation for a tobacco card series issued by the American Tobacco Company between 1909 and 1911 as inserts in cigarette packs. The set comprises 524 cards depicting Major League Baseball players from the period, printed in a small 1-7/16 by 2-5/8 inch format on thin cardstock with colour lithographed portraits on the front and tobacco brand advertising on the back.

T206 is the foundational pre-war baseball card set and home to the most famous trading card in the world: the T206 Honus Wagner, of which approximately fifty examples are known to survive. The set is also remembered for printing variations across more than a dozen tobacco brands on the reverse, regional distribution differences, and the relatively short production window that ended when player Honus Wagner himself reportedly objected to his card being used to promote tobacco. See our T206 Honus Wagner item entry for a full profile of the headline card.