HR Quick Fit Mainspring K620 for AS 1001, Wittnauer 6N7 - Alloy

HR Quick Fit Mainspring K620 for AS caliber 1001 and Wittnauer caliber 6N7 plus perhaps similar ébauche watches, white alloy. See images for precise mainspring specifications. I likely have several of these so the one you get may differ very 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.