I got this a few months ago with a coin lot from ebay. I don't know if this is a die cud because the actual cud part is a different color then the rest of the coin.

If you showed pictures that were a tiny bit closer I (and others) may be able to help you better.

Appears to be as you stated. Perhaps the color variation could be attributed to the 75% copper of the metal composition. A nice find what ever the case. 

It has some on the back too. Just a little spot though.