BESTFIT Mainspring 47X for Universal caliber 285, 287, 292, 385, 386, 387 Chronograph - Alloy

BESTFIT Mainspring 47X for Universal caliber 285, 287, 292, 385, 386, 387 Chronographs plus perhaps similar ébauche watches, white alloy, new in envelope. See image for precise mainspring specifications. I likely have several of theses 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.