Marco Mainspring #180 for 5/0s Elgin Grade 380 Factory No. 2705 - Steel

Marco Mainspring #180 for 5/0s Elgin 15J Grade 380 movements, Factory No. 2705, steel, new in envelope. See images for further details. I likely have several of these so the one you getmay differ very 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.