Newall SUPER Security Mainspring #451 for Elgin 6/0s No. 2890 - Alloy

Newall SUPER Security Mainspring #451 for Elgin 6/0s, No. 2890, alloy, new in envelope. See image for further details and precise specifications. I likely have several of these 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 a pretty good job of representing the item