Nivaflex Unbreakable Mainspring NA860 for Omega 331, 332, 333, 341, 342, 343, 351, 352, 353 - Alloy

Nivaflex Unbreakable Mainspring NA 860 for Omega caliber 28.10 RA, 30.10 RA, 331, 332, 333, 341, 342, 343, 351, 352, 353, 35.1 automatic movements, plus perhaps several other Omega calibers, white alloy with attached bridle, new in envelope.  See image for precise mainspring specifications and further helpful information. 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.