Longines Factory Mainspring for caliber 8L, 8/68Z - Steel

Longines Factory Mainspring for calibers 8L and 8/68Z and perhaps others, steel, new in likely open packaging. I likely have several of these so the one you get may differ slightly from the images. 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.