Dennis, I believe these were issued (or at least sold) by Fremont Coin which was in the back of one of the tourist souvenir shops on Fremont St around fourth street. They used to occasionally have some chips and tokens so I used to stop in there every so often. I’m sure I have purchased a few of these silver ingots in there. I was very sorry when they closed. I want to say the guy’s name was Carlino, but not certain.