Marco Marshalloy Mainspring 3874M for MST 374, 375, 377, 379, 384, 385, 393, 394, 403, 404, 405, 406 - Alloy

Marco Marshalloy Mainspring 3874M for Helbros 53, Jeambrun 415PS, 451, Lemania 196, Lorsa 49R, MST 374, 375, 377, 379, 384, 385, 393, 394, 403, 404, 405, 406, Oris 470, Otero 87, 95 caliber movements, alloy, new in envelope. See images for precise mainspring specifications and further details. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.