HR Nivastar Mainspring G705 for Font 150, Kurth 400, 404, 410, Venus 75 - Alloy

HR Nivastar Mainspring G705 for Font 150, Kurth 400, 404, 410, Venus 75, O'maire 116, 126 caliber movements and quite likely others as well, white alloy, new in envelope. See image 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.