BESTFIT Mainspring 510H for Durowe 500, Gruen 240, AS 922, Brac 2001 - Alloy

BESTFIT Mainspring 510H for Durowe 500, Gruen 240, AS 922, Buren 370 and Brac 2001 caliber movements plus perhaps similar ébauche watches, white alloy. See image 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 a pretty good job of representing the item.