Rezista Mainspring #149 for Bulova 6R, 9AT, Benrus E, Font 1246 - Steel

Rezista mainspring #149 for Bulova 6R, 9AT, Benrus E, Font 1246 caliber movements plus perhaps other similar ébauche movements as well, 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 in 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.