I’ve been researching the years of use and ownership of different molds that Burt/ASM/CPC have used over the years.

These are the bits and pieces that I have so far for the story of the Tri-Club mold, made by the Burt Co. and later ASM.

The first owner of the mold may have been Jay Myers (who owned Jaymyers Ltd. and A. B. P. Casino Supplies (both London, UK). He first used it for some British chip orders in the late 1960s, and some other casinos on the continent during the 1970s.

I think that John Huxley Casino Equipment (London, UK) may have acquired the two companies and perhaps the mold in the early 1980s..

In 1984 or 1985, Joseph Fabrizio and Don Jarchow purchase Langworthy. In 1986, they open Gamblers General Store (Las Vegas, NV) to sell gambling supplies to the public. Around this time, they acquire the Tri-Club mold, and start selling both inlaid chips and chips that they hot stamp themselves.
I believe that GGS/Langworthy used it as late as 1999. The last use I was able to date was for the Hanks Country Inn Casino (Belfair, WA) (which according to the ChipGuide and the Gaming Table, opened in 1999;
http://chipguide.themogh.org/cg_chip2.php?id=WABEHC&v=2169078832

Your chip dates from between 1986 and 1999. Some years ago, someone bought a collection of “floor sweeping” chips originally from the Gamblers General Store, posted some pictures on Pokerchipforum.com, and some of them have that cancelation. See below;

The oldest archived scan of the GGS website from December 1998, shows them no longer selling clay chips to the public, and mainly selling chips made by R.T. plastics.

From what I understand, Gamblers General Store may never have had a Nevada license to sell casino chips. If you look through the ChipGuide, you will see that all or almost all the Tri-Club chips for Nevada casinos are NCV chips or roulette chips, which did not have a cash value.

I hope that helps.