I think this one is pretty interesting. Dockman and Sons produced cards of boats, soldiers, animals, and baseball players. If you look at the back of this card, you see a checklist for animals.
When you turn the card over, you would expect to see a lion, zebra or a monkey. You would be very surprised to see what is there.....Honus Wagner.
PS, the T205 Cobb from the first part of the thread, I sold it to you several years ago. It's nice to know you still remember the story. It is a beautiful card.