Bulova Factory Mainspring for caliber 7AK, 7AA, 7AN, 7AH, 7AP - Steel

Bulova Factory Mainspring for caliber 7AK plus the many variants of that (7AA, 7AH, 7AN, 7AP) and perhaps even more similar ébauche watches, new in open envelope, steel. 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.