It is called a Jeton, I don't know a lot though.

I was going to make some funny comment about Monaco not being France, but since I don't know you (and you don't know me), it may seem nasty.

I actually was spurred to respond when you said Peacock. Do you have a scan? Are you a collector. Please feel free to email me, I'd love o discuss the chip. My last name is Peacock.