NEWALL Security Mainspring #186 for Bulova caliber 10L - Steel

NEWALL Security Mainspring No. 186 for Bulova caliber 10L plus perhaps other similar ébauche watches, steel, new in envelope. 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.