Prepare for picnics, backyard events, date nights and everything in betweenGarden accessoriesPicnicware Whilst the crystals on the 160xx generation of Datejust watches remain made from acrylic, the sloped "pie pan" style dial in the former generation is absent, and replaced by 1 with a completely flat surface area, much like https://www.watchesworld.com/a-history-of-watch-reference-numbers/