Comsco Mainspring #1063 for 18s Elgin No. 1956 - Steel

Comsco Mainspring #1063 for Elgin 18s Movements, Factory No. 1956, steel, new in possibly frail envelope. See images for precise mainspring specifications and further details. I likely have several of theses 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 an adequate job of representing the item.