You can leave that field blank and still findthe date for your watch however if you complete the field we will provide a listing of watches from our Seiko catalogsthat match the movement and case code. If you were paying close attention you may have noticed we asked for the case code in the form above but we did not mention using it when calculating the date. Mvmt-Case Serial Why Do We Ask for the Case Code I know example #3 was not made in 2004 since I bought it new in 2014. The remaining four digits of the serial number indicate the production number for the watch.If your last for digits are 0000 then you have the first watch made for that model reference number.Returning to our examples and using the second digit from the serial number we get the following production dates:

It tells you the month the watch was manufactured.Here are the possible values: The second digit of the serial number is also useful. the 7S36 was first made in 1996 so #3 is from 2004 or 2014.the 6119 was first made in 1970 so #1 is from 1970 or 1980.Using this additional information we can update our three examples: Sako Rifle Serial Number Date You may notice this does not tell us which decade.That is why we also ask for the model number.For many of Seiko's movements we know the first year they were producedand for most movements they were produced for less than 10 years.This helps us narrow down the decade. The first digit of the serial number tells you the last digit of the year the watch was made.Looking at the example images: Mvmt-Case Serial How is the Date Calculated

Sako date of manufacture