Nervinca Unbreakable Mainspring for Bulova 5AH & 5AD - Alloy

One Nervinca Unbreakable mainspring for Bulova caliber 5AH & 5AD plus perhaps other similar ébauche movements as well, alloy, new in case. See images for precise mainspring specifications. 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.