Copyright © www.Chronometrictime.com, All rights reserved. Use of this website constitutes acceptance of our Terms & Conditions.
Over the years there have been several incorrect versions of serial number databases that have made it confusing and at time difficult to accurately determine the date of a watch. Out dated information is the main cause that leads many people to inaccurately date their wristwatch.
The table below has been carefully complied and represents a more accurate serial number range. In most cases you will find serial numbers stamped between the lugs at the 6 o clock position (or for the earlier models stamped on the outside of the caseback). However, several models have surfaced showing slight deviations from this normal stamping pattern, where serial numbers are found to be stamped at the 12 o clock position. In either case, the bracelet would have to be removed to view the serial numbers. This can be done very easily using a simply pin removing device or a fine but strong needle or safety pin.
Please note: The serial numbers were re set in 1954. Furthermore, between 1975-76 serial numbers were re-used in later service cases. This is why often service replace cases have 4 million serial numbers. A change in serial number is observed from 1987-2010. Here, a Letter Prefix is seen as following. From 2010 randomly generated numbers & letters are used.
Rolex Bracelet Codes
Rolex Bracelets can also be dated much in the same way as cases. The date code can be found on the clasp. A combination of 3 numbers are often seen, for instance, 4 59 would translate to the forth or last quarter of 1959 (Oct-Dec). This method is mainly seen on bracelets from approx. 1950s-1970s. From 1976-2010, a combination of Letters sometimes associated with numbers (indicating month) were used. For instance R 2 = Feb 1993. The table below summarizes the alphabits that correspond production year from 1976-2010. Additional S stamp would indicate service replacement. Randomised numbers are seen from 2011 onwards.
Tudor serial numbers are somewhat more complicated and therefore difficult to accurately date as far less information is available. However, having said that, the table below is a rough guide and would be updated as further research is conducted. Please note, the serial numbers were reset in 1984.