HR Mainspring E313 for Bulova 6B, Felsa 128, AS 427, Movado 550 - Steel

HR Ev-R-Last Mainspring E313 for Bulova 6B, Felsa 128, AS 427, Movado 550 caliber movements perhaps other similar ébauche watches, steel, 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.