NuTemper Mainspring No. 201AP for Bulova 5AB movements

NuTemper No. 201AP steel mainspring for Bulova caliber 5AB 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.