If i see super rare brands (nubio, parmigani, richard mille, HD3, etc etc I would think fake, juts because those watches are not readily for sale, at least where I am from, Baltimore, Maryland. That, coupled with the fact that these watches cost big bucks and are well known makes me wonder about the authenticity when I see someone wearing one. I know that I personally have bought watches like those based on that same idea. :)