From Robert E's site.
"B" MOLD -- "B" and dash, repeated eight times. 1960's-present Bazaar Supply & Equipment Co., N. Y. The owner told me the mold was never used very much, especially today, and never used by a casino, rather a light chip for home games and clubs. (However, Bill Borland's Blue Book of Casino Chips describes it as a "registered casino design," no longer in use.)

However Borland puts it, molds are not registered with anyone for use in a casino. Molds belong to companies and if they can sell chips, they will.

IMO, a BIG NO!