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

Newall Security mainspring No. 548 for 0s Waltham Movements, Factory No. 2220, steel, new in envelope. See images for precise mainspring specifications. 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.