Marco Mainspring #3242 for AS 913, 1049, 1159, 1828, Kurth 340, 341, 344, Felsa 64, 296, 298 - Steel

Marco Mainspring No. 3242 for AS 913, 1049, 1159, 1828, Kurth 340, 341, 344, Felsa 64, 296, 298, Font 60, 601 caliber movements plus perhaps others as well, 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 a pretty good job of representing the item.