Sorry about not explaining further. Thomas Day wrote what is essentially a pamphlet called "Casino Tokens of Monte Carlo" many years ago and it was available in print from the American Numismatic Association (I think) but has been out of print for many years. It has details on the majority of Monte Carlo jetons and plaques from the first half of the 1900s or so. A PDF version is downloadable at http://montecarlocasinochips.com/montecarlo.pdf . Each item was assigned a number and a lot of us old guys refer to those numbers. Hope that helps.