I guess after they are discontinued somehow. This casino closed 30+ years ago. The chips are probably sold by the casino owners as part of the closing down process? Not sure how though, as Nevada have some strict policy that you have to destroy the chips from closed casinos, but maybe the rules where different back in the day?
I mean I read all of Nevada Gaming Commission Section 12 a few weeks ago when I got back into chipping, and when a casino is discontinuing chips (either from going out of business, selling the business to someone else, or just want to use a new chip) they have to provide a breakdown of what they are discontinuing including I believe the amount that is "outstanding" (not been redeemed). They have to give like 6 months for people to cash those chips, and need to run ads in a nevada newspaper for several weeks (the newspaper has to have distribution at least 2 times a week) and some other weird stuff and then state how they are going to "get rid of the chips after that".
Drilling them, Selling Them, Giving them away, Destroying them... Whatever they choose has to be approved by the Chairman or something of the Nevada Gaming Commission
My question really is does the general public have access to buying these chips (regularly) from the casino when they are discontinued or do casinos normally sell them to a few people like Spinetti's gaming privately or do they destroy them regularly. If they destroy them (I would assume this doesn't happen often anymore unless for some weird reason the chairman of the Nevada Gaming Commission requires it) I guess the only way you would ever get them is to actually take them from the casino at face value.
I would love to know stuff like how each chip was "discontinued" examples. Destroyed, Cancelled (Drilled Holes), Privately Sold, Publicly Sold etc. or at least a stat like approximately 80% of casinos choose to sell their chips to private bidders and give some away to family members.
In a perfect world I would want to know, how each chip was discontinued, the total amount of chips created/the amount of chips that remained outstanding after they were discontinued, but I am like 99% sure only like .001% of chippers know that information and they wouldn't ever talk about it cause it would hurt business.