Marco Mainspring No.231 for 12s Waltham 17j No. 2224A - Steel

Marco Mainspring No.231 for 12s Waltham 17j Model 1894, Factory number 2224A, steel, hole end, new in envelope. See images for precise mainspring specifications and 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 a pretty good job of representing the item.