Trutex Unbreakable Mainspring for Rolex caliber 720, AS caliber 1501 - Alloy

Trutex Unbreakable Mainspring for Rolex caliber 720 and AS caliber 1501 automatic movements plus perhaps other similar ébauche movements as well, 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 an adequate job of representing the item.