HR Quick Fit Mainspring K307 for Omega 510, Bulova 6AE, 6AF, AS 1538 - Alloy

HR Quick Fit Mainspring K307 for Omega caliber 510, Bulova caliber 6AE, 6AF & AS caliber 1538 plus perhaps many more similar ébauche watches, white alloy, new in possibly replacement 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.