HOW TO APPROXIMATELY DATE YOUR ROLEX
This chart is designed to help you approximately identify the year of production of a Rolex watch.
If you are in doubt, you can always find the serial number on the warranty certificate. On the watch itself it can be found on the lugs at the 6 oclock position on older models or engraved in the rehaut on newer models.
A new serial number system in 2010
In 2010, Rolex introduced a new serial number system for its watches.
This means that Rolex stopped following any sequential numbering system or order altogether, and now, Rolex engraves its watches with a randomized, and unique identifying letter and number. Before this, it was quite easy to estimate the age of a watch, as well as a year of production with the help of Rolex serial number databases.