Marco Mainspring #801 for 18s South Bend Factory No. 19528 - Steel

Marco Mainspring #801 for South Bend 18s Movements, Factory No. 19528, steel, new in envelope. See images for further details. 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.