Sounds like this is a vintage desirable ,hard to find .999 silver "Avalon" Art Round made by the "Golden Lion Mint".
Don't listen to the chatter about your rounds "only" being "worth spot". The better statement is, that they are "always" worth "at least" spot. Millions of people Collect,Trade, sell, and buy the Collectors Art Rounds and Bars, that have a premium Collector value above spot..
Imagine that a shirt, or a mop, or shoes, or underwear you bought in 1984, still had a fluctuating documented value on the stock market, no matter how much you wear it, and you could take it into any
department store and get money for it, anytime.
That is how to look at silver, gold etc. There is always a basic value to a lump of silver and gold.A lot of the The Older, and some Current, Bars, Rounds, Medals, and Commemoratives are worth more than "spot" and attract Collectors from all over the World.
It is a fun Hobby to Collect what you like,and to know, that no matter what you decide to pay for it, it will "AT LEAST" always have a basic "spot value", and a Premium Value to other Collectors.
jmho :)