From 1980 Directory....not even sure if the “Empire Club” was actually called that. Listed as Empire Room. I am still digging through paperwork looking for the EC stamp. (Might not exist in the research I have)
I could only locate the 1980 Directory.
If you look closely at the hot stamps for these following chips...there are 4 different fonts/ molds.
The 50c orange and $100 black are NOT the same.
So...3 different H/C chips. (Fonts) All the L chips the same .
There is a chance that none of these chips belong to Empire Club/Room. We can only go by what our “Chipping forefathers “ say


Chip images from the ChipGuide