Elast Mainspring for Longined caliber 10/68Z - Steel

Elast mainspring for Longines caliber 10.68Z movements and perhaps others as well (10L and variants thereof), 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.