NuREZISTA Mainspring #1508 for Longines caliber 23Z - Steel

NuREZISTA mainspring #1508 for Longines 23Z movements and perhaps others, steel, new in envelope. See images 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.