Albert,
The little "C" symbol on the chip indicates Casino Austria. This is a company that manages casinos world wide including many casinos on cruise ships. I have never seen this chip. I know that many times the casinos on cruise ship are called, "Casino Royale". That's not to say this is from a cruise ship. I have been wanting to contact them to see if I can get some history of casinos they manage, managed, and what chips may be been used in the various casinos they did/do manage. Maybe this is the motivation for me to pursue it. If I do and learn anything I will let you know.