NuREZISTA Mainspring #2005A for Benrus caliber BZ 8-Day Movement - Steel

NuREZISTA steel mainspring #2005A for Benrus caliber BZ 8-day movements and perhaps others, new in envelope. These are for larger movements designed to run for 8 days, which include primarily car and travel clock movements. See images for precise mainspring specifications. 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.