HR Mainspring A758 for Waltham 6¾ Ligne Model 670 #2244 - Steel

HR mainspring A758 for Waltham for 6¾ Ligne Model 670, Factory No. 2244, steel, new in envelope. See image for precise characteristics. I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. See image for further details. Images do a pretty good job of representing the item.