In about 1992 I received as a gift (from Aix-les-Bains) a portion of the series; orange and green of denoms I can't remember) and I sent a color photocopy to a historian here in the USA and another in Europe who specializes in French casinos. I asked for info, but there was none -- and that was the first time these unknown chips were seen by both collectors.

Though there were many different names (and combinations of) from Aix-les-Bains, at that time there was nothing known of Casino Kursall Aix-les-Bains (I don't know if anything has been found since).

The study of Aix-les-Bains becomes quite deep, from des Fleurs, on to Cercle, Grand Cercle, SFGA Fermiere, Societe Fermiere and so on...

...and Casino Keusaal is not even listed in the Jetons Metalliques in the Aix-les-Bains section, but that work was completed in 1994... so I do not know what all has been found since.

If I did not get the chips
'first-hand' from someone well-known in the Aix-les-Bains casino business, I would have questioned the authenticity, but as it stands; I consider them authentic.

If I find a duplicate orange I'll send it to you to add on to what you now have.

I trust you did a thorough search; I'm convinced, in fact.