Newall Unbreakable Mainspring 180N for AS caliber 1238 - 1269 - Alloy

Newall N-Dur-All Mainspring 180N for AS caliber 1238 - 1269 movements plus perhaps other similar ébauche movements as well (like a bunch of other AS calibers), alloy, new in envelope. See images for 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.