Bulova Factory Mainspring for caliber 7AMC, 7AD - Steel

Bulova Factory Mainspring for caliber 7AMC plus at least 7AD and perhaps 7BSC and perhaps even more similar ébauche watches, steel, new in sealed envelope. The wonderful thing about factory mainsprings is they always fit! 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.