My wife gave me this $2 coin today because she thought it was shiny. Very considerate of her. I thanked her and was going to just take a quick cursory look at it when something seemed to stand out.
On the obverse side of the coin are what looks to be extra metal bulges raised. They all are lined up with the stamping of all the letters and symbols that are on the edge of the coin. here a few pictures I took with my digital microscope. Sorry for the light washing it out but I cannot adjust the lighting.
Here are the pictures:



