Dynaflex Unbrekable Mainspring for Bulova 10BS, 10BC, AS 1200 - Alloy

Dynaflex Unbreakable Mainspring for Bulova caliber 10BS, 10BC & AS caliber 1200 plus perhaps other similar ébauche watches, white alloy, new. See image for precise characteristics. 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.