HR Mainspring No. 311 for Blancpain 46, 46N, Buren 55, Tissot 13.6, 15.2, 15.3 - Steel

HR Mainspring No. 311 for Buren 55, Blancpain 46, 46N, Tissot 13.6, 15.2, 15.3 caliber movements plus perhaps similar ébauche watches, steel, new in envelope. See images for precise mainspring specifications. 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 so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a satisfactory job of representing the item.