Lot of 3 Longines Factory Mainsprings for caliber 4L - Steel

1/4 Dozen (so 3) Longines Factory Mainsprings for caliber 4L 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.