Swartchild Black Shield Mainspring #4362A for Elgin 12s No. 2874 - Steel

Swartchild Black Shield steel mainspring #4362A for Elgin 12s movements Factory No. 2874, new in envelope. See images for further information and precise mainspring specifications. 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 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.