Hi Jay
The MOP that says BOUGIVAL must be from the Casino de Bougival ( the only one that existed in Bougival)
See please
http://www.themogh.org/cg_chip2.php?id=FRBOC3
I had opened the casino in the chipguide but I never had seen anny chips or plaques from there.
MOPs were used in Europe in the 2nd middle of XIX century / beginning of XX century.
This MOP must be from XIX century ( before the fire of the casino on 1893).
From CHIPGUIDE

"Bougival is a village located on the Seine River at 17kms from Paris. Casino de Bougival - Theater. Dances, concerts, performances every night. Electric light. It will have worked between 1884 and 1893. References Le Gaulois, 6.26.1884: "Today it will be good to reveal what the Bougival Casino is. On the island between the bridge and the lock, next to a well-known restaurant was a grove. A team of men broke down the trees and with the wood they had built a chalet-the Bougival Casino was set up on two floors. Underneath the showroom and the second floor is transformed into a game Cercle. Several people were afraid to see the gambling in Bougival. Bourdeille the owner says that his Cercle will be a restricted cercle, where only the members of the great Cercles of Paris will be admitted ".. it would not have been so…"There's a crowd in the casino, and I played a hell of a game ... before yesterday I lost the gambling 5000 louis ..." (La Caricature, 8.1.1885). Jules Legroux in his book Hommes et Femmes, 1888 says "The lighthouse indicates to the sailors the port of shelter, the electricity indicates to the Parisians the gambling room. In Bougival there is a casino like in the baths. It is played on the first floor and the comedy is on the ground floor. The roof terrace is for poets and lovers of the stars - it's always empty. " The casino suffered a fire in 1893. We do not know if it was rebuilt."

My friend you have done a GREAT ACQUISITION. Congratulations.
I have visited almost the 200 casinos in France. I had been in Nice área more than ten times. But never found anny interesting jetons, chips or plaques in the shops.
You are a GREAT HUNTER.