This 1971 Congo 10000 francs notes is one of the great rarities of the Central African States (BEAC) issues. It is not overly difficult in very low grade, but I have never seen a true UNC. This AU (very light center fold) is one of three known to exist. Value would probably be close to $1000.

The Chad 10000 francs was issued at the same time as the Congo note above. Like the Congo P-1, I have never seen a true UNC. The one below is one of two AU examples I know. Value same as the Congo note.