Marco Mainspring #2768 for Blancpain 41, MST 379 - 404 - Steel

Marco Mainspring No. 2768 for Blancpain caliber 41 and MST caliber 379 to 404 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 in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.