TEMP-RITE Mainspring for Bulova caliber 4AD, Benrus H & S, MST 367 - Steel

Temp-Rite Mainspring for Bulova caliber 4AD, Benrus caliber H and caliber S, Gruen caliber 675 and MST caliber 367 movements and perhaps 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.