Don't wait for the watch to be bought before trying to identify the authenticity. First of all, you should pay attention to the purchase channel of watches. It's best to buy it at the designated counter of Omega. Can be guaranteed to be genuine licensed goods, you can enjoy the national (global) warranty. If you choose online shopping, I suggest you go to regular watch sales websites such as Didi, Jufengshang and Wanbiao. This can also guarantee that it is genuine and licensed.