LeCoultre factory mainspring for caliber 449, 450 - Steel

LeCoultre factory mainspring for caliber 449, 450, steel, new in package. The wonderful thing about factory mainsprings is they always fit. The package contains just the one. 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.