A number of distributors sold the CC molds. There are several different CC molds.
Frank Walters, Detroit
Hunt & Co, Chicago
I have sample chips on the CC mold, I know came from TK Speciality when they were still in Kansas City. They later moved to Reno.
When I look at the Burt records of who owned what molds, I can't find any one company these molds were registered to. I could be wrong, the records are a little hard to read. Burt did not call the molds by the same names we bestowed on them.
Example: Small & Large Keys were called Gem & Super Gem by Burt and the distributor, BC Wills.
I suggest everyone bookmark Robert E's site.
http://www.antiquegamblingchips.com/molddesignindex_site.htm
There is no better information on molds anywhere.
Look under Small & Large circle molds for your chip.