from Sociéte des Bains de Mer, the company who own and runs the casino's in Monte Carlo, Monaco. The one you see is from the late 1940s to eary 50s. It is a stamped jeton of 5 FF (french franc). As you might know the revaluted the FF in 1960 by taking 2 zero away to make the new franc NF see scan where they revalued

So it was a long time ago when you could play with 5 'old' FF at Monte Carlo. When I come across one I keep you in mind, but can't garantie I find one and at what price.
If you want to see a even more old jeton ....

It is from 1927, Casino du Lac Bagnoles
Kind regards,
Belgium Bob R-4479