Rolex serial number checker, date your watch, honestly

On older watches, engraved between the lugs at the 6 o'clock side, under the bracelet, so the bracelet has to be moved to read it. From around 2005 it also appears on the rehaut, the inner flange between the dial and the crystal. The first engraved rehauts date to 2004, every Oyster reference had one by 2008, and from about 2008 the rehaut is the only place it appears. The rehaut carries the word ROLEX repeated around it with a crown at the top, and the serial sits in the gap at 6 o'clock. The number between the lugs on the other side, at 12 o'clock, is the reference rather than the serial.

Because Rolex restarted its numbering from about 23,000 in 1954. A six-digit serial can therefore belong to the 1926 to 1953 run or the 1954 to 1987 one. The number alone genuinely cannot separate them, so this checker returns both rather than picking.

It is from 1987 to 2010. The letters were issued in sequence and the published charts anchor each one to a starting serial, so most cover a single year and the rest cover two. Where a prefix spans two years you get the window rather than a guess inside it: R is 1987 to 1988, and nothing in the number itself separates the two. The model, the papers and the case finishing are what narrow it.

Rolex randomised its serials completely. Three dealer charts show the last dated prefix, G, running to 2010 and every year from 2011 as random. Their prose differs on when it happened, one saying mid-2011 and another around late 2010, but none of the tables runs a letter into 2011, so 2010 is the last lettered year. There is no date encoded in a randomised serial, and any tool that returns a year for a modern Rolex serial is guessing.

Approximate, and deliberately presented that way. Rolex has never published a serial-to-year chart, so every chart in circulation, including the ones behind this page, is reconstructed from observed watches. The one dealer page that states a margin puts it at a one to two year range, and gives the reason: cases and movements were stockpiled and assembled later, so even a correct reading dates the part rather than the finished watch. A second dealer gives the same answer without a number: the prefixes changed mid-year and the ranges overlapped, so the published dates are guidelines and not calendar facts. No source we could find says whether the charts date the case or the movement, and this page does not guess.

Possibly neither, exactly. The published charts even contradict themselves in places, most visibly around 1977 and 1978, which is why this checker returns a window across that span instead of choosing.

No. Serials are engraved on counterfeits too, and a correct-looking number on the wrong movement is a common combination. Dealers who authenticate for a living report the same number being reused across many different fakes, so a serial that looks right is not even evidence that it is unique to your watch. Matching papers are not proof either. A Rolex card prints the dealer, the purchase date, the country code, the buyer, the model and the serial, and all a match tells you is that the card and the watch agree with each other, not that either is genuine. The movement, the dial printing and the case finishing decide it.

Just the year, approximately. The model lives in the reference number, engraved between the lugs at 12 o'clock, which identifies the family, the bezel and the metal rather than the age. How a reference is put together is set out above, and it is trade convention rather than anything Rolex publishes. For a check what matters is that the serial, the reference, the movement and the case all agree with each other.