Be sure to Observe that starting off in 2005, Rolex began engraving the serial number over the internal bezel (generally known as the rehaut) beneath the crystal on the 6 o’clock placement. Even though the crystals about the 160xx generation of Datejust watches are still comprised of acrylic, the sloped https://www.watchesworld.com/a-history-of-watch-reference-numbers/