Seiko Automatic Case Back Gasket – Flat Style – For 6138 Chronograph Models

Restoring a Seiko 6138 chronograph?

Don’t forget the case back gasket.

This flat-style rubber gasket fits 6138 models like 0040, 0049, 0011, 0012, 0030, and 0031.

It’s new without tags, so no packaging, but it’s the right part for the job.

If your watch is losing water resistance or the back feels loose, swap this gasket in.

Simple to replace—just pop the old one out and fit this one.

Unbranded, but made for these specific Seiko automatics.

Keep your vintage Seiko sealed and running clean.

MPN not applicable, just a solid little gasket.

Grab one before you button up that case.