~~~ in the USA.

My only suggestion is to hit the local phone books and newspapers and maybe find out who she was (is) and if she ordered other chips...

Usually (not always), women buy chips for a private women's club from Nevada casinos, such as the 7,000 Harold's Club chips (in 1950) where many were in unused condition and in their original cartons with railway shipping labels with a Chicago address (which I sent to Howdy after inspecting/cherrypicking).... Yeah. It's all in the history. Good luck.