In the meantime, there’s some proof that Intercontinental distributors hated the inconsistent and often illogical numbering techniques of their Swiss overlords. Although the crystals around the 160xx era of Datejust watches remain created from acrylic, the sloped "pie pan" model dial in the former generation is long gone, and changed https://www.watchesworld.com/a-history-of-watch-reference-numbers/