HR Nivastar Mainspring GA40 for Felsa 410, 415, 690, 692 to 695, Bulova 11ARC automatics - Alloy

HR Nivastar Mainspring with attached bridle GA40 for Felsa 410, 415, 690, 692 to 695, Bulova 11ARC, Benrus BT, CA automatic movements plus similar ébauche watches, 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.