As early as 1930s (CV monogram). Counterstamp material: 1950s thru 1960's/+. Note the counterstamp; results of the French Monetary Reform Act where every 100f then became 1 New franc (N.F.). Casinos had the option of either ordering a new inventory or adjusting the value as seen on your chips...along with also adding a comma to equate 1/100, or "strike-out" the 0's. Very common material. Always available in quantity. Published values from $5 to $75+ for higher demoms depending on condition.

VICHY had many casinos through the years:

1838 - Cercle du Commerce.
1865 - Grand Casino
1879 - Cercle International
.......Eden Theatre -> 1913 Le Fleurs
1890 - La Restauration -> 1986 Grand Café
1898 - Alcazar / Cercle des Sports / Elysée-Palace
1900 - Kursaal Jardin de Vichy
1900 - L'univers
1920 - Petit Casino

The above list compiled by Monsieur Marc-André REYNCKENS.

JB