HR Quick Fit Mainspring K407 for Bidlingmaier 915, Universal 138 - Alloy

HR Quick Fit Mainspring K407 for Bidlingmaier (Bifora) caliber 915, Universal caliber 138 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.