Newall SUPER Security Mainspring #548 for 0s Waltham No. 2220 - Alloy

Newall SUPER Security mainspring No. 548 for 0s Waltham Movements, Factory No. 2220, alloy, new in envelope. See images for further details. I specialize is hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.