The Seiko serial number decoder Find the manufacture date of any Seiko watch Enter the Seiko serial number and movement from your watch in the boxes below. The watch's date of manufacture will be calculated using the first 2 characters of the serial number and my list of Seiko movement manufacture dates. You will also be given an eBay link to check the watch's value, useful links such as manuals, etc (if available) and for quartz models the battery information may also be returned. Although this tool cannot be used to guarantee a Seiko's authenticity it can be used (along with visual indicators) to spot a fake Seiko. If more than one date is returned then either I lack data for that movement or it was made for over a decade.

For information about how this actually decodes and To get the best chance of getting only one date returned it is best to enter your Seiko movement in the 2nd box. The boxes are not case sensitive. Both the serial and movement can contain the letter S, which can look very similar to a 5. Looking to date a Citizen watch?

10/5/27 V2.23 Version number is changed to same version as driver itself. CITIZEN is a registered trade mark of CITIZEN WATCH CO., LTD., Japan CITIZEN es una marca registrada de CITIZEN WATCH CO., LTD., Serial / CITIZEN COM Parallel USB USB Virtual COM.