The most obvious thing to look for to determine whether a Chanel Z.G. 58096 watch is real is the price of the watch. Chanel watches generally retail in the thousands of dollars price range; anything below this price range can be assumed to be fake.
Another way to check for the authenticity of a Chanel Z.G. 58096 watch is to examine the watch face and the band. An authentic Chanel watch should not have any scratches on the watch face, as it is made from Sapphire Crystal. Authentic Chanel watches are also accompanied by two holograms that match to a hologram placed on its Certificate of Authenticity.