NEWALL Security Mainspring #1230 for Bulova 4P & Gruen 830 - Steel

NEWALL Security Mainspring No. 1230 for Bulova caliber 4P and Gruen caliber 830 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.