HR Quick Fit Mainspring K650 for Precimax 300, Unitas 6325, 6326, 6329 - Alloy

HR Quick Fit Mainspring No. K650 suitable Precimax 300, Unitas 6325, 6326, 6329 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 differf 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 suitable job of representing the item.