Illinois 16s Mainspring No. 47309 for 60hr from S. LaRose - Alloy

S. LaRose packaged (likely Swiss made) Mainspring for 16s 60hr Illinois movements, Factory No. 47309, alloy, new. 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.