HR Quick Fit Mainspring K664 for Font 70, Uwersi 57/12, Osco 50, 52, Cyma 162, 163 - Alloy

HR Quick Fit Mainspring K664 for Font 70, Uwersi 57/12, Osco 50, 52, Cyma 162, 163, AS 1950 caliber movements plus perhaps similar ébauche watches, 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 in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.