Plymouth Ply-Power Mainspring for Bulova 10BS, 10BC & AS 1200 - Alloy

Plymouth alloy mainspring for Bulova caliber 10BS, 10BC & AS caliber 1200 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.