HR Nivastar Mainspring G709 for A.S. caliber 1220 - Alloy

HR No. G709 Nivastar alloy mainspring for AS caliber 1220 movements and perhaps others, new in frail or dirty envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. 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.