I didn't attend that particular show but I remember those chips being made at that time (as a commemorative, sort of). I believe that was during the period Mel J. was running the brass-chip company.

The Nevada Chip Corp. has a Reno (actually, Sparks, as stamped into the metal slug) address on the ChipGuide manufacturer's page (see link), although I thought Mel's company address was in San Leandro, CA (northern CA). But I'm recalling from memory from years ago.

https://chipguide.themogh.org/cg_chip2.php?id=NVREN1&v=3075615839

There was a "kerfuffle" (for lack of a better term) that went on back then, but I'll leave that in the past where it belongs.