Hi
I bought a small old collection containing a jeton that is listed in the chipguide as being from Belgium.
Trying to put a jeton/ chip on a casino by monogram alone is a difficult matter.
I bought this jeton

as being from casino Chaudfontaine Belgium chipguide entry

(picture prtscrn chipguide)

and noticed that my jeton is a 10 denomination and is marked 10R.

As the Belgian currency is BEF, BF or € (or Reichsmark M for some WWII plaques, see Spa) this can NOT be a Belgian jeton.

There was a little note with the jeton saying casino de Cologne.
I searched and casino de Cologne (Keulen, Köln) should have been a German small casino build by the German architect Heinrich Strack at age of 25.

Can somebody help me with this one, even knowing witch currency 10R represents would be nice?

All help is welcome. Thanks for looking. JO from Belgium