Newall Security Mainspring #511 for 18s Waltham No. 2222 - Steel

Newall Security Mainspring #511 for 18s Waltham, Factory number 2222, hole end, steel, new in frail envelope. See images for precise mainspring specifications. 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.