Nivaflex Unbreakable Mainspring NA814 for AS 1361, 1336, 1382, 1384, 1385, 1386 - Alloy

Nivaflex Unbreakable Mainspring NA 814 for AS caliber 1361, 1336, 1382, 1384, 1385, 1386 & Wittnauer caliber 11ARK automatic movements, plus perhaps others as well, white alloy with attached bridle, new in envelope.  See image for precise mainspring specifications and further helpful information. I likely have several of these so the one you get may differ slightly from the images. 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.