PM Mainspring #230 for Illinois 16s 60hr Factory No. 47309 - Steel

PM Mainspring No. 230 for 16s Illinois, 60hr Railroad Movements, Factory No. 47309, steel, new in envelope. See images for precise characteristics. 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.