Oldest commercially produced baseball card?

[1880nonsports]

Part of the problem in analyzing what would constitute a card for this discussion would be which of the following are viable candidates to be considered cards:

distributed contemporaneously alongside product
distributed in a product
available as a premium for buying a product
used in an exchange such as a ticket or currency
sold as novelty or memento

As I collect "insert" cards and the discussion is baseball - I think the N167 OJ's best fit the bill. There are depictions of base ball on the pages of books followed chronologically by steel engravings and CDV's, tintypes, the trade cards, and finally the tobacco/gum inserts. I prefer to keep each distinct. Should we also be discussing the manufacturer's motivation to define a card? Does an items size, construction, or production edify our definition?