The chip below belongs to another ivory collector. The chip was bought along with other London club chips (Brooks’s and RC?). I hope they are legit as the pictured chip cost thousands.
I’ve never seen fake Indian club chips. I have seen one sided Indian ivory chips were part of game set. In the game there were 8 rectangle and 8 circular chip. Plus the were extremely well carved. The White chips were not carved by those Indian carvers.

Bottom line is one is never sure on ivories, but it doesn’t match up well with either American or Indian ivory.