When you have got the serial number then look it up in our Longines serial number matrix. To put a date of production on your vintag Longines watch you have to locate the serial number which most often is found on the in- & out-site of the back case. Instead Eterna made sure we can date watches since their calibers were only used in short periods of time. In some cases, such as the watches produced by the brand Eterna, serial numbers were not used as markers to know the year of origin. One serial number indicates in which year or periode the watch was produced while the other number (the reference number) indicates which model or serie the specific watch belongs to. Together with a reference number, the brand Omega placed their serial numbers on the inside of the backcase.

Though in the periode dating from 1958 to 1974 the reference number on Certina watch carried an encrypted message giving away, which calibre the watch was equipped with, which material the case was made from and which watch model you are dealing with. The two numbers serves the same pourposes as explained in the Omega chapter above-written. While Omega keeps the serial number on the inside of the backcase Certina leaves the serial number visible on the out site of the watch back case accompanied with a reference. If you want to know which year your vintage watch was produced? – Then take a closer look at ” Serial numbers by year”. This page will enable you to track down the production year of your vintage watch.

Cartier serial numbers year