As some Seiko movements were made for more than a decade you may end up with a couple of possibilities. This is how this tool works, I have collated the manufacture dates for as many Seiko movements as I could find which this tool uses along with the date code from the serial number. The Seiko movement and model number can be found on the caseback in two sets of 4 digits joined by a dash. Exceptions are pre-1970 models when the numbers were 7 digits long.
There are visual clues as to which decade the watch may be from but the easiest way is by using the Seiko movement number, if you can find the date range for the particular Seiko movement you are likely to be able to pinpoint the exact date. All modern Seiko watches have the date of manufacture contained in the 6 digit serial number. The letters O, N and D are used to represent October, November and December. As only 1 digit is used for the year this will only show you the last digit of the year, the decade cannot be found from the serial number, more on this later.įor the second digit 1-9 covers up to September. The first digit translates to the year and the second shows the month. This serial number contains digits indicating the date. Seiko watches use a 6 or 7 digit serial number stamped on the caseback.
#Seiko watch serial numbers how to
The easiest way to find the date of a Seiko serial number is to use the automated Seiko serial number decoder but this page explains how to do it manually.
Date a Seiko by serial number How to decode the serial number on a Seiko watch