Crescent Resilient Mainspring for 16s Waltham Factory No. 2208 - Steel

Crescent Resilient Mainspring for Waltham 16s movements, Factory No. 2208, steel, new in envelope. See images for further details. I likely have several of these so the one you get may differ slightly from the images.  I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.