Marco Mainspring #232 for Waltham Colonial Series Model B 17j No. 2237 - Steel

Marco Mainspring No. 232 for Waltham Colonial Series (basically a 12s) Model B 17j movements, Factory No. 2237, steel, new in envelope. See image for further details. I likely have several of these so the one you get may differ slightly from the images. I specialize is hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item