With a new day, my second guess: former African nation of Zaire (now known as the Democratic Republic of the Congo)
I can't believe no guesses on this: Vnickels started talking about how King Farouk of EGYPT and many other famous collectors cleaned their coins.
@ Vnickels: Just to be clear, you did mean a FORMER nation, which no longer exists in name and governance from what it once was, correct? I am seeing several guesses for nations that still exist, some even which didn't have currency (in the paper sense). Thanks.