Alloy Mainspring for 18s Waltham No. 2222

Unmarked Maker Swiss made Alloy Mainspring for 18s Waltham, Factory number 2222, Hole end, new in envelope. See images for precise mainspring specifications. 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.