NEWALL Security Mainspring #1800 for Waltham 504 & Rayville 49 - Steel

NEWALL Security Mainspring #1800 for Rayville caliber 49 and Waltham (Swiss) grade 504 plus perhaps other similar ébauche watches, steel. See image for precise characteristics. I specialize is 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.