The Bamford Array involves limited edited series in collaboration With all the likes of Rolex and Patek Phillippe. They’ve purportedly even matched a watch dial to some purchaser’s most loved shade of lipstick. In the late sixties, Rolex began to experiment with various dial and bezel styles for your Daytona. https://www.watchesworld.com/a-history-of-watch-reference-numbers/