HR Nivastar Mainspring G475 for Cort 640, Benrus AR, AT, EY, Movado 220M, 221 - Alloy

HR Nivastar Mainspring No G475 for Cort caliber 640, Movado caliber 220M, 221, Wittnauer caliber 7TN, Benrus caliber AR, AT, EY movements, plus perhaps other movements as well, alloy, new in envelope. See images for further data and precise mainspring specifications. 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.