HR Nivastar Mainspring G318A for Omega 240, Gruen 270, 271, 272 - Alloy

HR Nivastar Mainspring G318A for Omega caliber 240, Gruen caliber 270, 271, 272 including the SS movements, plus perhaps other similar ébauche movements, white 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.