HR Nivaflex Mainspring G242 for MST 281, Gruen 210, 211, 212 - Alloy

HR Nivaflex Mainspring G242 for Gruen caliber 210, 211, 212 & MST 281 plus perhaps many more similar ébauche watches, white alloy. See image for precise characteristics. 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 an adequate job of representing the item.