Automatic movement. Hack mechanism (second hand stops when crown is pulled out to set the time ? standard feature on all genuine Rolex watches). Sapphire crystal watchglass. Screws in the links, not pins. Rubber seal at trip-lock winding crown. Serial band/number on last link/lugs. Full Stainless Steel band/case, and will never fade or wear. Solid back with characteristic Rolex green sticker. Screw-in watch crown. All the appropriate Rolex markings in the correct places.
