BESTFIT Mainspring 313H for Beguelin 71, Eterna 675, Vulcain 78 - Alloy

BESTFIT Mainspring 313H for Beguelin 71, Bidlingmaier 734, Eterna 675, Cyma Tavannes 182, 814 - 836, Kasper 500, 600, Vulcain 78 caliber movements with someone having written on one it is suitable for Movado 107, Oris 400 and MST 450, 451, white alloy, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get bay differ slightly from the images. I specialize is hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a satisfactory job of representing the item.