Nivaflex Mainspring for Universal 361, AS 1300, 1326, 1690 - 1693, Bulova 10OC - Alloy

Nivaflex Mainspring for Universal 361, Bulova 10OC, AS 1300, 1326, 1690 to 1693 & 1790 to 1793 caliber movements plus likely others as well, white alloy, new in envelope. See images for precise mainspring specifications. I specialize is 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.