1/4 Dozen Longines Factory Mainsprings for caliber 9/35 - Steel

1/4 Dozen (so 3) Longines Factory Mainsprings for caliber 9/35 plus perhaps 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.