Dennis - I remember this type of machine, it was one version of the Strike Machines. I can't recall where I played it but it was in the early days of Silver Strikes. I do remember asking a Slot Attendant (the people who used to roam the casino floors with rolls of coins for slot machines) if they did in fact pay the 250 coin jackpot i all Coins, I member him saying the machine had hit the 250 symbols twice but the casino would only pay out 10 Coins and the balance of the $1750.00 in Bills, the reason he said was because they didn't have 250 of the coins in the vault at any given time
If Jack Haddock is still living and if somebody knows how to contact him he would member I am sure which casinos had these types of machines in play at one time or another.
Those were the Good Old Days back when strikes were first out, the fact that they were Pure Silver was the reason I started playing and collecting.
I was at Harvey's Tahoe the day they unveiled the Very First $7 strike machine and remember asking a drink server if she had a cloth napkin of a bar towel that I could put in the coin tray so the strikes wouldn't get damaged when they dropped out since they weren't in capsules back then.
Walt