It's not often that you see a Baseball card from the mid-19th century. Although, I guess you could argue that this isn't really a card -- at least, not the kind we are accustomed to. What this is, in actuality, is a CDV, or carte de visite -- which is just a fancy way of saying it's a vintage photograph mounted on cardboard.
The subject matter is certainly of interest to fans of the Dodgers (Heritage Auction link) and Baseball historians alike. Featured is an 1860 CDV of the famed Brooklyn Atlantics ball club.