Most of what I wrote here is archived.

Many years ago I visited Whitehall in Palm Beach and on dislplay was a wheel, table and the "B" chips as you illustrate, but mostly maroon color... and the smaller size chips. Then, at another time, the same table was on display at the South Florida Fair, but without chips... Prior to all this, I had a few conversations with some folks who were actually in the club; one said his graduation party was there... and, another; Herbert Swope, said he played roulette there. When I asked him if he remembers what the gambling chips looked like, he said they were Mother-of-Pearl...! Several others who were in their 80's when I spoke to them said they did not remember what the chips looked like.