These are inlaid roulette chips used at Harveys at Southshore Tahoe in the 1970s. Here is a picture of the chips I was able to acquire over the years; they are not easy to find.

If you need any to complete your sets, I'll send you your choice of these "E" chips for $10 in the USA. All 30 are available and if you should want them all, I'll send them to you for $250. Prices include postage.