See my other reply to Bjoern.
That explains why I think it was used somewhere.
I now agree its Kenyan denomination. I said Rhodes initially after looking at it for about 2 seconds as I recognised the font.
One article on Hefner said he lived a while at a Safari Hotel in Kenya.
This casino is in operation today:
http://www.casinocity.com/ke/nairobi/safpar/

Email your friends in Africa, see what you can find out about what this place was 35 years ago.