Newall SUPER Security Mainspring #768 for 12s Illinois Factory No 47345 - Alloy

Newall SUPER Security Mainspring #768 for 12s Illinois, Factory No. 47345, T brace, alloy, new in envelope. See images 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.