Card fronts show a photograph of the player, either black-and-white or tinted one of several colors, with the player's name and team superimposed.
The backs, as the name indicates, are made up to serve as postcards, with places marked out for the stamp, the message, and the mailing address. Some have been found with blank backs, however.
Cards can be found to have been printed in a variety of colors; that is, a certain player's card can appear in more than one color tint.
As these are barely identified and are largely without identification, there may be more cards added to the official set total in the future.
Prominent cards in this set include:
Ty Cobb (Detroit)
Ty Cobb (Athletics)
Lou Gehrig (3 variants)
Rogers Hornsby (3 team variations)
Babe Ruth (2 variants)