That is a good find. At 80 cents and the markings on the bottom, you knew it was a steal without weighing it. Just meant, once home and able to weigh, by CyberDan's findings, you would know approximately how much silver was in it. If they aren't dented and come in pairs I have sold them on eBay and priced at about twice melt with free shipping and had no problems selling them. Of course, that was when precious metals were climbing and everyone and his brother was hot for silver and gold. I haven't found a pair in good shape for 3 years or so. I hope you took my post as it was intended.
T.