Marco Mainspring #2954 for Bulova 10P, 13AT, 13AF, AS 872, 864, Wittnauer 7TN-73 - Steel

Marco No. 2954 steel mainspring for Bulova 10P, 13AT, 13AF, AS 872, 864, Wittnauer 7TN-73, Benrus AR, AT caliber movements, as well as perhaps others. 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 a pretty good job of representing the item.