Nivaflex Unbreakable Mainspring N6164 for Alpina 568, Culmina 91, Election 415 +many more - Alloy

Nivaflex Unbreakable mainspring N 6164 for Alpina 568, Culmina 91, Durowe 55, Felsa 308, 324, Election 415 and even more calibers 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.