Make sure you Be aware that starting off in 2005, Rolex commenced engraving the serial quantity within the internal bezel (also known as the rehaut) underneath the crystal for the six o’clock placement. Pounds: Authentic Rolex watches are created from large-high-quality components, typically causing a heavier feel than counterfeit watches. https://www.watchesworld.com/a-history-of-watch-reference-numbers/