Barry,
I have never seen a "White" Bally's 24 Lines Roulette. I think someone may have gotten the "Light Gray" and the "White" colors confused and they were listed as two different colors - this happens all the time.

What looks white to me may look light gray to someone else.

Tke care,
"Mr. Birl
aka "Mr. Roulette"

P.S. - There was a "White" ftom the previous Bally's Aotosort Style Roulette chips.