Seiko 6138 Case Spring (Part No.8133-0341)

Fits Seiko 

For other 6138 models see my list on 6139 case spring

6138 has 2 different size cases

Secures the movement when the back is screwed on

The internal tag is for location, some aftermarket do not have this tag

Modern reproduction in spring stainless steel

Original carbon steel part no longer produced, this stainless steel copy, will last a lifetime, no rust.

Buy 5 - get 1 free - what a bargain

Post free - to anywhere in the world