The Rolex serial number decoderPlease note, watches made after 2010 no longer have sequential serial numbers and cannot be dated this way.
To find your serial number you must remove the strap at the 6 o'clock position and you will see it engraved on the case between the lugs. The model number can be found between the lugs on the opposite side of the watch.
This does not validate if a watch is genuine or not, it purely translates the date code to find the year of manufacture. If the watch type was not being manufactured during the year suggested by the serial number it suggests a fake.