The Trade Cards below are the most common of all Baseball themed trade cards. They are commonly known as H804-7 Merchant's Gargling Oil, have 5 cards to the set, were made in the 1880's and are known to have been produced by up to 4 different printers. It comes in many different shades, colors and variations.
A vast majority of the cards were produced for Merchant's Gargling Oil which was some sort of castor oil/cough syrup/miracle drink sold at time. In fact, it is rare to find this card advertising a different product. Also, another rarity are the blue and yellow background versions produced by The Courier Lithograph Company.
Photoalbum Link: Victorian Trade Cards: