Newall Security Mainspring No. 2027 for Bulova 17TR & Venus 121, 122 - Steel

Newall Security Mainspring for Bulova caliber 17TR & Venus caliber 121, 122 and perhaps others, steel, new in dusty 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.