Marco Mainspring No. 3043 for Bulova caliber 7T & 7AT - Steel

Marco No. 3043 steel mainspring for Bulova caliber 7T & 7AT and perhaps others, new in stained envelope. See images for precise mainspring specifications. 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.