Marco No. 610 Mainspring for 16s E. Howard "L" Model Factory No. 55 - Steel

Marco Mainspring No. 610 for E. Howard 16s "L" Model movements, Factory No. 55, steel, new in envelope. See images for further details. These will also fit the 18s "N" but that #55 is usually a couple of inches longer than this one. 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. mages do a pretty good job of representing the item.