My dad has given me two silver coins, and I was wondering if you could give me a bit of history on the coins and of they are valuable, one side has a crest with a crown on top and wings on the side and says burg.co.tyr.1780-x Archie.avst.dux the other side has the bust of Marie Therese and says m
theresia.d.g/ s.f at the bottom, r.imp.hu.bo.reg. I am out of the country but will try to upload pictures, I went and checked at a jeweler and the said they were almost full silver. Any insight would be awesome.
Edit: Pics
Not Bavarian, Austrian -a thaler (dollar) of the Empress Maria Theresa.
Now, that's not to say it was actually minted in Austria in 1780!
I was aware these coins were popular currency in the middle east and Africa until very recently and TIL that they were minted all over Europe until the 1960's, and still are in Austria, and all dated 1780.
This page http://www.theresia.name/en/ will tell you more, and so no doubt will /r/coins.