KikoPress

Journal

Longer writing on Seiko: how the movements changed, what the catalogues left out, and the history a reference page has no room for.

Tools

Seiko serial number decoder

The caseback tells you the month and the last digit of the year. Add the caliber and the decade falls out too.

6 or 7 characters, from the caseback

Optional, but it is what fixes the decade

How the decoding works