Seiko 4205-015* Case Spring

1 case springs

Seiko Part Number 8133-2139

Fits Seiko Divers cases in the case number series 4205-015* 

Does not fit the 4205-014* series

Secures the movement when the back is screwed on

Modern reproduction in spring stainless steel

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

This is for 1 spring 

Post free - to anywhere in the world