HR Mainspring #269 for Excelsior Park Chronograph - Steel

HR steel mainspring #269 for Excelsior Park Chronograph caliber 4, (EP-4), 40 & 42  movements plus perhaps other similar ébauche 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.