HR Nivastar Mainspring G299A for Gruen caliber 430, 435 - Alloy

HR Nivastar Mainspring G299A for Gruen caliber 430, 435 caliber movements, allow, new in envelope. 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 a pretty good job of representing the item.