Comsco Mainspring #12211 or 10s N.Y. Standard Factory No. 7080 - Steel

Comsco Mainspring 12211 for 10s N.Y. Standard movements, Factory No. 7080, steel, new in envelope. See mages for precise mainspring specifications. 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.