These chips have been attributed to the REX Club Taft, California. I can’t say that it is impossible the chips were Not used there, but I don’t believe they could/would of been used there.

***image from the ChipGuide

They were sent to a guy named Ken Williams in Berkley, Ca 1966.
I don’t know if he used them in a Club or were for home use. I would take an educated guess and say home use because all the chips I have seen have no wear.(ONLY A GUESS)
I went to look Ken Williams up (I don’t have access to a Berkley directory), so I went to Newspapers and had so many hits that I decided not to pursue looking for info. The name was too common.

****I am looking for the pink chip to add to my collection...”if you have a trader, cough it up” from Gene Trimble’s famous words. I miss that guy ☹️