The first two are unknown location and the R on the 10 denomination is very strange. They are bone chips.
I read EK with the K probably standing for Kursaal.
So you will have to look for a country that used kursaal, Belgium did also, and that used R as a currency.

CH5 is the oldest serie from Herbesthal. I have the 5/20/100 in collection.

Can you send me what you paid by DM email please, I'm curiuos.

Jo from Belgium.

BTW if interested in Belgium you will have a lot of fun but also a lot of work finding items.
I can help.