PM Mainspring for Elgin 6/0s No. 2890 - ONYX Steel

PM mainspring for Elgin 6/0s movements, Factory No. 2890, ONYX steel, new in envelope. See images for precise mainspring specifications. 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.