Here is a list of the 14 UV codes on Luxor chips that I know about. I have most of these in my collection. There are a couple on the list I do not have but they were reported by other collectors about 2 years ago when I compiled the list.
Egypt / blank
Egypt / Egypt
Nile / Nile
Luxor / Circus Circus
Luxor / Luxor
blank / blank
Tut / Tut
Circus Circus / Circus Circus
Pyramid / Pyramid
Pyramid / Nile
Nile / Luxor
Tut / Egypt
Tut / blank
Circus Circus / Pyramid
If anyone has other variations in their collection I would like to know about them so I can update the list.
Paul