It's a thaler of the Austrian state of the Archbishopric of Salzburg, KM 485. At least, it's supposed to be. I have to say I'm skeptical of this one... among other things, the portrait looks pitted and incomplete. Genuine ones are reasonably scarce; CV in that condition woud be around $400.
It's supposed to weigh 28.06 grams. I'm betting it weighs considerably less than that.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis