However, it is no quarantee as to when your watch was shipped from the factory.
The numbers simply represented the two-digit year in which the watch was produced.
While this The following "Round Numbers" Serial Number List has been comprised of known serial number ranges for the years listed.
By checking a particular serial number against this list you should be able to date a watch with reasonable accuracy.
We also publish The Rolex Report, a series of critically acclaimed reference books used by thousands of watch dealers, collectors and enthusiasts around the world.
ABOVE: Around 2005, Rolex started engraving the Case's Serial Number into the inside edge of the case (at the 6 o'clock position, under the crystal and below the bezel), also known as the rehaut, as shown in these images, which were taken at BASELWORLD 2005, in Switzerland in early April.
Please note, during the 1990s and 2000s, it is estimated that Rolex produced around around 1 million watches per year.