Mainspring Watch Service Part For SEIKO Movement Cal. 6309, 7S26, Barrel Complete, etc.

If you are having your watch serviced, do yourself a favour and change the mainspring as part of the service; the mainspring is probably one of the most important parts in a mechanical movement. If your watch does not yet need a service, keep one for future use, as these are getting harder and harder to find. You WILL need it at some point and it will greatly extend the life of your watch and also its accuracy. Brand new and sealed mainsprings for SEIKO calibers. Mainsprings are made by Generale Ressorts (Switzerland) and Complete Barrels are made by SEIKOSHA (Japan). Choose from the list of calibers in the listing. Please note that I do not accept return for parts. Feel free to contact me for whatever questions you might have.