Swiss  25 Jewel ETA automatic movement (same movement that is used in  genuine Rolex Tudor Submariners).
Serial  number (accurate) and model number engraved between the lugs.
Hack mechanism (second hand stops when crown is pulled out to set the time standard feature on all genuine Rolexes).
Genuine sapphire crystal.
Full solid stainless  steel .
Laser etched Rolex Logo on sapphire crystal at 6 o'clock position.
Triple  wrapped 18k solid gold jubilee links.
Band is linked by threaded screws, not pins.
Solid back with green Rolex holographic sticker and model number.
Solid screw-down back removable by genuine Rolex tool.
Jubilee  style bracelet.
Laser printed dial.
LARGE 2.5X Cyclops Date Magnification, as per the ORIGINAL Datejust .
Fluted  bezel .
One-piece solid screw down crown with Rolex engraving, trip-lock, rubber seal.
Perfect weight and feel.