HR Nivastar Mainspring G343 for Cortebert 601, 653, Gruen 126, 127, 179 - Alloy

HR Nivastar Mainspring G343 for Cortebert 601, 653, Gruen 126, 127, 179 caliber movements plus perhaps other similar ébauche watches, alloy, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. 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.