There is an unique number engraved on the back of each watch,one watch one number, and higher value for collection, showing noble and charm identity.Exquisite and unique appearance design, vivid rhythm, handsome chic.23 diamonds automatic mechanical watch core, ruby bearing, longer using life.Sappire mirror, anti-wear intension is close to the level of diamond,ensure the surface of watch mirror antiwear,keeping the surface of mirror smooth.Waterproof design can reach 50meters depth of water.325L steel watch chain, with fine plating process, showing the charm of wrist,Make people full of confidence.