I recently went through my great grandfathers coin collection he gave me years ago and came across over 200 foreign coins and 40 foreign bills. This bill caught my eye. I know nothing about collecting and trying to find out a price on it. I know its rare, but how rare?
There are varieties from R to RRRRRR (slightly rare to almost unheard of rare) of that note, depending on signatures and issue date. So as huckles says, you'd need to post images for someone to figure out which one you have.