HR Quick Fit Mainspring K237 for Omega 19.4, ETA 980, Otero 25, Benrus AY - Alloy

HR Quick Fit Mainspring K307 for Omega 19.4, ETA 980, Otero 25, Lanco 524, Benrus AY caliber movements plus perhaps other similar ébauche watches, white alloy, new in sealed 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.