Where is the mint mark on the new presidential gold dollars?

According the the U.S. Mint it is on the edge of the coin



Click on edge lettering from here:

http://www.usmint.gov/mint_programs/$1co...

Where is the mint mark on the new presidential gold dollars?
It's on the edge. The edge stamping is incused totally without regard to "heads" and "tails", or any other orientation, and is totally random.

barber