Comsco Mainspring #1060 for 18s Elgin Factory No. 812 - Steel

Comsco Mainspring #1060 for Elgin 18s Movements, Factory No. 812, steel, new in likely frail envelope. See image for specifications and further details. I specialize is hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.