HR Mainspring #956 for Wittnauer caliber 11ES - Steel

HR mainspring No. 956 for Wittnauer 11ES movements and perhaps others, steel, T-Brace end, new in envelope. See images for precise mainspring specifications. 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.