Nivaflex Unbreakable Mainspring for AS 1215, 1290 - Alloy

Nivaflex Unbreakable mainspring for AS caliber 1215, 1290 plus perhaps other similar ébauche movements as well, alloy, new in envelope. See images for further data and 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.