The 1904 WG-2 Fan Craze National League Reprint Set is one of the earliest 20th century baseball card sets. The original issue was designed as a deck of playing cards and was intended to be used as a table game. This 47-card set is printed with red backs and includes Brown, Chance, McGinnity, McGraw, Wagner and Willis.

Source:http://www.fritschcards.com

Kid Elberfeld - 1906 WG2 Fan Craze American League