Marco Mainspring #276 for Waltham 6¾ ligne Model 678, 679 No. 2251 - Steel

Marco Mainspring #276 for Waltham 6¾ x 8 ligne Model 678, 679 movements, Factory No. 2251, steel, new in envelope. See images for precise mainspring specifications. l 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.