I have the following jetons from the Casino Arosa in Switzerland. They are regular Bourgogne et Grasset jetons and come in four different styles.

- The CHF 5 has like a golden wire on the mother-of-pearl surface.
- The CHF 10 has a little square pattern.
- The CHF 20 looks like plain mother-of-pearl.
- The CHF 50 has a silver glitter surface.

What are the official names of these styles?