Mainspring for Seiko 6138 and 6139 movements Seiko 6139 During the 60s and 70s

During the 60s and 70s

End Type: Medium Tip

genuine Seiko DAL2BP diver’s strap designed to fit Seiko watches with a 19mm lug width

Strap Material: Rubber Urethane

The tweezers are sourced from two reputable brands: Rhino Pro Series (sizes No

Mainspring for Seiko 6138 and 6139 movements Seiko 6139 During the 60s and 70sThis is a new Swiss made replacement mainspring compatible with the vintage Seiko movements listed below. Please note, the mainspring barrel and arbor shown in the listing images are for reference only and are not included. They are simply there to demonstrate how the replacement mainspring fits within the original Seiko mainspring barrel. While the tail of the new generic replacement mainspring doesn't fit as tightly on the arbor as the original