~~~ and I can not stress enough that I believe the CC/5 is probably from Spain as well, except that there are so few collectors and the local research has yet to suggest any possibilities... and, all I know of is the 5 which the die-cut metal inlay that should not be confused with a "metal overlay" as seen in Monaco, where it is not fully embedded and flush with the surface of the core..

ChipGuide images

All I know of is the '5' denomination with the "CC" monogram.