Watch-Craft Mainspring 3283W for Wittnauer caliber 10ES, 11ES - Alloy

Watch-Craft Mainspring 3283W for Wittnauer 10ES, 11ES caliber movements and perhaps others, alloy, new in envelope. T-Brace end. 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 in 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.