Wittnauer Factory Unbreakable Mainspring for caliber 9WN - Alloy

Wittnauer Factory Unbreakable Mainspring caliber 9WN plus perhaps similar ébauche watches, alloy, new in envelope. The wonderful thing about factory mainsprings is they always fit! I likely have several of these to 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.