Marco Mainspring #279 for Waltham 7½ Ligne No. 2243 - Steel

Marco Mainspring No. 279 for Waltham 7½ Ligne Model 750 movements, Factory No. 2243, steel, new in envelope. 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.