Swartchild Mainspring for 16s Waltham Model 1872 Factory No. 2208 - Steel

Swartchild Black Shield Mainspring No. 4329 for Waltham 16s Model 1872 Movements, Factory No. 2208, T end, 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.