The “Datejust” name had turn into a long term fixture on its dial, along with other options including the arms, bezel, hour markers, and crystal (with cyclops magnification lens) took kinds that are still a great deal current on the fashionable Datejust watches that Rolex manufactures currently. 100M Water-proof: With https://www.watchesworld.com/a-history-of-watch-reference-numbers/