Here's a roulette chip from the Sal Sagev. There are only about a half dozen of the white roulettes in the hobby. There are, however, a couple of hundred of various colors (including white) sitting on a roulette table of one of the owners. The owner refuses to let any go. Catch Gene Trimble's article on the Sal Sagev in Chequers.

I had two whites and a yellow. A white and yellow was sold at the last AC meeting. This last piece I value at $175. I'd rather trade for crest and seals (especially BPOE c&s that I need)