HR Mainspring #454 for Bulova 10A, 10B, 10E, 10AI, 10AA - Steel

HR steel mainspring #454 for Bulova 10A, 10B, 10E, 10AI, 10AA caliber movements plus perhaps other similar ébauche wrist watches. See images for precise mainspring specifications. I specialize is hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.