Marco Mainspring #287 for Waltham 10 Ligne No. 2229 - Steel

Marco Mainspring No. 287 for Waltham 10 Ligne movements, Factory No. 2229, Strength .09, steel, new in envelope. 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 and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.