You should Take note that beginning in 2005, Rolex started engraving the serial range around the inner bezel (also called the rehaut) beneath the crystal in the 6 o’clock place. Bodyweight: Legitimate Rolex watches are constructed from large-top quality products, usually resulting in a heavier truly feel than counterfeit watches. https://www.watchesworld.com/a-history-of-watch-reference-numbers/