Thanks for all the info. I tend to agree that it is Sev Alexander.
The coin was actually cleaned with lemon juice but it stripped off most of the silver plating.
I suspect that it is a Fouree but have no idea when it was made. Probably not recently
I just wish I hadn't put it in lemon juice and I think it would be better off with no plating at all mow.
If anyone has any idea how old it is I would be grateful as it will probably go onto
ebay. Someone may want it.
Thanks to everyone for their help. You guys are the best.