Newall SUPER Security Mainspring #423 for Elgin 12s No. 2339 - Alloy

Newall SUPER Security Mainspring No. 423 for Elgin 12s Movements, Factory No. 2339, alloy, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. I specialize is hard to find watch parts and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.