I found a beautiful Brioni sport coat from a charity/thrift shop the other day; but the only concern I have is the label. It says 'Brioni International Tailor', and then the email address '[email protected]' Is this authentic? As I've never seen this before and nothing online. It's a beautiful coat none the less, but would make my day if it was real. It feels very high quality, and has the spare buttons sewed next the arm holes with silk lining. Many thanks!