NuVigor Mainspring No. 28Q for Bulova 6AC - Steel

NuVigor mainspring No. 28Q for Bulova caliber 6AC 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.