Plymouth Ply-Power Mainspring for Gruen 290, 291, 295 - Alloy

Plymouth alloy mainspring for Gruen caliber 290, 291, 295 movements, and perhaps 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 an adequate job of representing the item.