This T206 baseball card is what is known as a printer's scrap. The back of the card was used to test the printing press before printing new batches of cards. Consequently, this card has 4 backs in 1: 1 Piedmont back and 3 Tolstoi backs. It is a fun card to look at!
This is a normal Piedmont-brand back of a T206 baseball card.
This is a normal Tolstoi-brand back of a T206 baseball card.