BESTFIT Mainspring WA12 for Gruen 460, 470, 475, Buser 20, AS 1320, 1323 - Alloy

BESTFIT Mainspring with attached bridle WA12 for Gruen 460, 470, 475, Buser 20, AS 1320, 1323, 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 slightly from the images. I'll note as well that, oddly, none of them appear to be in a jiffy-pak, so you will need a winder to install them. 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 a pretty good job of representing the item.