Swartchild Black Shield Mainspring #4362 for 12s Elgin No. 2339 - Steel

Swartchild Black Shield mainspring No. 4362 for Elgin 12s movements, Factory No. 2339, steel, new in envelope. See images for mainspring specifications. This particular one is covered in major grease not unlike Elgin factory mainsprings and will need to be cleaned thoroughly before use. 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.