Newall SUPER Security Mainspring #546 for 0s - 3/0s Waltham #2228 - Alloy

Newall SUPER Security Mainspring #546 for 0s & 3/0s Waltham, Factory No. 2228, alloy, new in envelope. See image for precise mainspring specifications details. 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.