1.5x2.75". The 1909 E101 "Set of 50" baseball set is very similar to the E92 - Nadja, Croft's, Dockman, etc. sets of the same year. The cards have the same images as the E92 sets with each card featuring a full-color art rendering of a player photograph, usually in-action, set against a multi-color background. A white border with his last name, position, home city and league printed at the bottom frames each player's image. (The same pool of art was utilized by a number of brands.) The backs, however, are anonymous with "no advertising" with "This card Is One Of A Set Of 50 Base Ball Players - Prominent Members Of The National And American Leagues" printed on a creamy paper stock.

Franz Otto Knabe, was an American Major League second baseman from Carrick, Pennsylvania, who played for four teams. Knabe received MVP votes in three-straight seasons, 1911-1913, as a member of the Philadelphia Phillies and during his time with the Phillies, he led the National League in sacrifice hits. He was the player-manager for the only two seasons the Baltimore Terrapins and the Federal League were in existence.