Nivaflex Unbreakable Mainspring for AS 525, Bulova 10C - Alloy

Nivaflex Unbreakable Mainspring for Bulova caliber 10C, AS caliber 525 movements plus perhaps other similar ébauche movements as well, white alloy, new in envelope. 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.