Swartchild Mainspring #4328 for 18s Waltham Vanguard Factory No. 2222 - Steel

Swartchild Black Shield Mainspring No. 4328 for Waltham 18s Vanguard Movements, Factory No. 2222, steel, new in envelope. 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 a pretty good job of representing the item.