Marco Mainspring #202 for 18s Waltham Factory No. 2203 - Steel

Marco Mainspring #202 for 18s Waltham Older Model 1877-1879, 17 to 21j, Factory No. 2203, steel, new in envelope. See images for further details. I may have several of these so the one you get may differ slightly from the one shown. See images for further details. 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.