HR Ev-R-Last Mainspring E475 for Cortebert 640 & Benrus AR, AT - Steel

HR Ev-R-Last No. E475 steel mainspring for Cortebert 640 & Benrus AR, AT, Font 28 - 175 caliber movements plus perhaps similar ébauche watches, new in likely frail envelope. 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.