HR Nivastar Mainspring G819 for Unitas caliber 429 - Alloy

HR Nivastar Mainspring G819 for Unitas caliber 429 movements plus perhaps similar ébauche watches, white alloy. See image for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. 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.