Bulova Factory Mainspring for caliber 10AB - steel

Bulova Factory Mainspring for caliber 10AB, steel, new in sealed envelope. In know for a fact this mainspring fits many other 10 ligne Bulova movements. See image for further details. 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.