Authentic Mya's have stamped mya on every pc of the hookah. the hoses usually have the stamp, but some of the hoses don't. I buy mya direct for my store and some of the hoses out of the mya boxes don't have mya on them. but every single pc of any hookah, bambino, diva, razo, chic, octagon and pyramid all have mya stamped into the metal somewhere
the simplest way to check would be to call texas hookah, he is a great guy that does good business and would tell you the truth
just my two cents