NuVigor Mainspring No. 72 for Bulova 10B, 10L movements - Steel

NuVigor No. 72 steel mainspring for Bulova caliber 10B, 10L movements and perhaps others as well, 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.