HR Mainspring A107 for 16s Elgin No. 817 - Steel

HR mainspring No. A107 for Elgin 16s movements, Factory No. 817, steel, new envelope. See images for precise mainspring specifications. I recently acquired a batch of HR mainsprings that were virtually all labeled incorrectly but I've verified they are what I show them to be. 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.