Alloy Mainspring for ETA 761, 1201, Unitas 190, Bulova 8AE

Unmarked Maker Swiss Mainspring for ETA caliber 761, 1201, Unitas caliber 190, Bulova caliber 8AE movements plus perhaps similar ébauche watches, white alloy, 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.