Bulova factory mainspring for caliber 10AEC - Steel

Bulova Factory Mainspring for caliber 10AEC, Steel, new in envelope. See images for further details. The wonderful thing about factory mainsprings is they always fit! 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.