NuTemper Mainspring #584 for Waltham 3/0s Factory No. 2230 - Steel

NuTemper Mainspring #584 for Waltham 3/0s movements, Factory No. 2230, steel, new in very 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.