Marco Mainspring #3263 for Kurth 300, 310, 314, 314B - Steel

Marco Mainspring No. 3263 for Kurth caliber 300, 310, 314, 314B movements, steel, new in envelope. See images for precise mainspring specifications. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.