LeCoultre Factory ALARM Mainspring for caliber 12R 489 - Steel

LeCoultre Factory ALARM Mainspring for caliber 12R 489, steel, new in open package. The wonderful thing about factory mainsprings is they always fit. The package contains just the one and it is the ALARM side only. 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.