HR Nivastar Mainspring G370 for Omega 360, ETA 717, Universal 291 - Alloy

HR Nivastar Mainspring G370 for Omega 360, ETA 717 and Universal 291 caliber movements plus perhaps many more similar ébauche watches, white alloy, new in dirty envelope. See image for precise characteristics. 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.