The “Datejust” identify had become a everlasting fixture on its dial, along with other attributes including the arms, bezel, hour markers, and crystal (with cyclops magnification lens) took forms that remain very much current on the trendy Datejust watches that Rolex manufactures currently. 100M Water-proof: Having a drinking water resistance https://www.watchesworld.com/a-history-of-watch-reference-numbers/