Swartchild Black Shield Mainspring #4343 for Waltham 6/0s Model 1898 No. 2226 - Steel

Swartchild Black Shield Mainspring No. 4343 for Waltham 6/0s Model 1898 "Jewel Series" movements, Factory No. 2226, hole end, steel, new in envelope. See images for further details. These often came is some pretty sticky grease and will need to be thoroughly cleaned before used. I likely have several of these so the one you get may differ slightly from the images. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.