Sandsteel Mainspring for 6s Waltham No. 2217 - Steel

Sandsteel Mainspring for 6s Waltham Movements, Factory No. 2217, steel, hole end, new in a nearly demolished envelope. See images for precise mainspring specifications.  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.