Newall Security Mainspring #573 for Waltham Model 670 No. 2244 - Steel

Newall Security Mainspring #573 for Waltham Model 670 movements, Factory No. 2244, Hole end, steel, new in envelope. See image for precise mainspring specifications and further details. 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.