WATCH-CRAFT Mainspring 3813W for Bettlach 8100, 8120, 8140, Cort 681, Langendorf 860 - Alloy

WATCH-CRAFT Mainspring 3813W for Bettlach 8100, 8120, 8140, Cortebert 681 (and variants), Langendorf 860 (and variants), Elgin 698 (Seiko 6x8) caliber movements plus perhaps others, white alloy, 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 is 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.