Art rounds are a very nice way to collect silver. Personally, I enjoy the original art work that some mints put out, but those pieces look great!
How did you determine they were real silver and what's the purity? .900 or .9999? Are they stamped? PS...Oh ..here they are right here in River City...way cool. http://www.rivercitycoins.com/silverrounds/coinrelated/CoinRelatedSR.html
All are stamped on the reverse .999 troy ounce i believe. When i get home I will post the reverse pic.