Beacon Mainspring for Bulova 7AM - 7WM movements - Steel

Beacon Mainspring for Bulova caliber 7AM - 7WM and A.S. caliber 1001, 1193, 1115 movements, and quite likely others, steel, new in envelope. 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.