Nivaflex Unbreakable Mainspring N3251 for Aurore 8, Buren 35, Derby 67 - Alloy

Nivaflex Unbreakable mainspring N 3251 for Aurore 8, Buren 35, Derby 67, Nouvelle 525, 526 caliber movements plus perhaps other similar ébauche movements as well, alloy, new in envelope. See images for all supported calibers 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.