The most reliable way is to have it authenticated by a grading and authentication service.
This may be unnecessary though if it is obvious the coin is a modern reproduction. If it is a 1780 Thaler you can certain it is a reproduction as the originals are highly coveted due rarity and the Austrian mint made a large number of reproductions for sale as souvenirs at it's gift shop not to long ago.
Aside from the year, an original coin will have a patina from it's age as well as an accumulation of handling marks. Also older coins are not as "perfect" as modern coins and an original will display minting flaws not found on modern coins.
Maria Theresia Walburga Amalia Christina
maria barrera
The cast of The Absolutely Positively Sometimes Incredible Real Life Adventures of Theresa Maria Mastropiccho - 2011 includes: Andi Cappoli as Mrs. Angie Mastropiccho Rachel Oshlag as Theresa Maria Mastropiccho
Theresa Russo is played by Maria Canals Barrera.
I have one to!!! We're thinking that it MIGHT be a fake, but will eventually find the time to take it to an appraiser to find out it's real value.
Her name is Theresa (pronounced: Ter-ee-sa) Russo. The actress who plays her is Maria Canals Barrera.
Just herself. Daughter of Maria Theresa, Empress of Austria, and wife of Louis XVI of France. She was a real live person.
Jorgie Porter :)
jorgie porter
Her real name is Maria Kanellis.
theresa rose
Her real name is Maria Louise Kanellis.