HR Nivastar Mainspring G237 for Omega 19.4, ETA 980, Otero 25 - Alloy

HR Nivastar Mainspring G307 for Omega caliber 19.4, ETA 980, Otero 25 & Benrus AY plus perhaps many more similar ébauche watches, white alloy. 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.