Seiko Serial Number

| 16-04-2021
[RAND-1-100] Comments



Seiko only uses plastic and has since 1990. If the date and time wheels are metal or silver and the seller claims it is less than 20 years old, the Seiko is a fake. Seiko did use metal prior to 1990 and the authentic ones usually have a caliber number of 7006 or 7009. Ask the seller for a caliber number when inquiring about the product.

Find the manufacture date of any Seiko watch

Seiko Serial Number Decoder

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Seiko Serial Number Lookup

Seiko Serial Number

The caliber number is the first four digits of the eight digit, hyphenated, number. In the example below, the caliber number is '7N01.'. Grand Seiko Complete Service is a service offered as a package in which a movement overhaul is performed together with a 'Light Polish' of the case and metal band. Light polish is. All modern Seiko watches have the date of manufacture contained in the 6 digit serial number. Exceptions are pre-1970 models when the numbers were 7 digits long. Serial Number: The serial numbers on modern Seiko models are comprised of 6 digits. The first digit indicates the year, the following character the month and the remaining 4 digits a unique production number. The month is listed as 1-9 for January to September, then 0 for October, N for November and D for December.

Seiko Serial Number Check

Seiko watches have a 6 or 7 character serial number on their casebacks. The second character can be a letter but the rest are all numbers. You can use the Seiko serial number in conjunction with the movement number to calculate the year of manufacture. The month and last digit of the Seiko'a date of manufacture is calculated using the serial number and then narrowed down to a decade using my database of Seiko movement manufacture dates. You will be given an eBay link to check the value, useful links such as manuals, etc and for quartz models the battery information.

If more than one date is returned then either I lack data for that Seiko movement or it was made for over a decade. For details of my Seiko movements list click here. For information about how this actually decodes and how to decode a Seiko serial yourself click here (also has a video showing how to find your serial number and movement).
Seiko serial number
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. The movement can contain the letter S, which can look very similar to a 5.
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Please note, the new Seiko 5 sports cannot be dated by serial number. If you have a 2019 or newer Seiko 5 sports, then the 6 digit serial is actually a production number and cannot be used for dating purposes.

Seiko Serial Number

My related tools : Bulova, Citizen, Omega, Tissot, Rolex, Breitling, Longines.