Marco Mainspring #3275 for Longines Caliber 10.68Z (10L) & 11.68Z (11L) - Steel

Marco steel mainspring #3275 for Longines caliber 10.68Z or 10L & 11.68Z or 11L movements, and perhaps others, T-end, 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 an adequate job of representing the item.