Illinois Mainspring for 16s No. 47333 (EXACT) - Alloy

Illinois EXACT Mainspring for 16s movements, Factory No. 47333, alloy (unbreakable, rustless), new in envelope. See images for precise mainspring specifications and note that this is not for 60hr movements. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.