HR Mainspring No. 318A for Gruen 270, 271, 272 & Omega 240 - Steel

HR Mainspring No. 318A for Gruen 270, 271, 272 & Omega 240 caliber movements plus perhaps many more similar ébauche watches, steel, 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.