HR Mainspring SA131 for 21/0s Elgin Factory No. 6246 - Alloy

HR Mainspring SA131 for Elgin 21/0s Movements, Factory No. 6246, alloy, new in 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 so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.