I didn't mention the Paris/MGM by name due to my lack of knowledge concerning if there were any others so I said handful but yes, it was good to see the question asked specifically on the 2 US (FR) jeton types so it has a much better chance of being answered. I did say the same about the denominated jetons from London only being used on FR in the same way so maybe they should also be in roulette chips but (as you explained) that is not the same as they have a cash value and roulette chips are always ND (which AR colour/wheel/roulette chips are). The person I spoke to concerning the jetons and plaques eventually remembered that they were used on the FR tables only but as he wasn't a FR dealer that was the best I could get out of him.
As I thought had been shown, the Portsmouth jetons were used on a FR table as per the photo and as there were different colours seen (and because no cash versions have ever been found, yet) I thought that it would confirm that they were FR not AR but then, the photo isn't very clear. They would still be French roulette style not US style (which are the clay type) as they are jetons not chips but as I've said before, I see your point because of the different colours and ND but they are the only things relevant to AR. They have more in common with FR than AR is basically what I was saying.
I did mention (a couple of times) that it may have been a "hydrid" (ie Jetons on the AR table as I explained) to keep the classier French style game going a little longer as that was the only reason I could see ND colour chips/jetons being used on an AR table. And it is the same over here, 2 completely different styles of game with AR being more profitable which is why FR was phased out, mainly in the 1970s by all accounts. Whilst we call it AR over here, there is still only 1 zero which is different to the US and something I always wondered about but that's just how they classified them over here (and still do) mainly because they didn't have jetons, a rake and a posh layout. Sort of like a cheaper version of FR I suppose.
As Jo explained (and I did but through other people's help) FR only used jetons and AR use chips although if a hybrid version then it would be the only time that jetons have been used on AR tables as far as anybody knows. Jo mentioned that using clay chips with a rake (I can't remember the proper name he used, sorry Jo) would be impractical in the same way that FR jetons would be kept in racks and not stacked. Using a rake is one of the main differences in the 2 games so if no rake then not FR.
Again, yes they could well be AR chips in the form of jetons IF used on an AR style game (no rake and different type of layout) but they could also also be classed as jetons only used on FR which again, could still qualify them as roulette only but not chips which was my main point as they are jetons.
If they were given their own section (ND) roulette jetons it would solve the problem either way but I can't see that happening.
Hopefully more information will show up but (as I've said before) they are jetons regardless of what game they were used on so putting them in roulette chips wouldn't, strictly speaking, be correct but that's just my opinion. I thought that type would be the way to distinguish them not what game they were used on. I hope that has explained where I have been coming from better. They are still a great addition to the story regardless of what they are.