Newall Security Mainspring #541 for 6s Waltham Factory No. 2219 - Steel

Newall Security Mainspring #541 for 6s Waltham Movements, Factory No. 2219, steel, hole end, new in well-handled envelope. See images for precise specifications. I likely have several of these so the one you get may differ very 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.