Marco Mainspring No.235 for 12s Waltham 7j to 15j No. 2224A - Steel

Marco Mainspring No.235 for 12s Waltham 7j to 15j Model 1894, Factory No. 2224A, steel, hole end, new in envelope. See image for further details and 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 a pretty good job of representing the item.