Nivastar Mainspring A39C for AS 1590, 1591 Automatics - Alloy

Nivastar Mainspring A39C for AS caliber 1590, 1591 automatic movements, with attached bridle, plus perhaps other similar ébauche watches, white alloy, new in envelope. See images for precise mainspring specifictions. 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.