Meanwhile, there’s some evidence that Intercontinental distributors hated the inconsistent and infrequently illogical numbering programs of their Swiss overlords. Though the crystals within the 160xx era of Datejust watches remain made from acrylic, the sloped "pie pan" model dial within the former era is absent, and replaced by just one https://www.watchesworld.com/a-history-of-watch-reference-numbers/