“Every single model tried to have logic in their numbering program but unsuccessful miserably,” Mandelbaum ongoing. “It just represents the entire absurdity with the Swiss attempting to think of a numbering procedure. Whilst the crystals on the 160xx era of Datejust watches remain produced from acrylic, the sloped "pie pan" https://www.watchesworld.com/a-history-of-watch-reference-numbers/