NuTemper Mainspring No. 79½ for Gruen 161 movements - Steel

NuTemper No. 79½ steel mainspring for Gruen caliber 161 movements, and quite likely others, 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.