Marco Mainspring #3260 for Longines Caliber 12.19 (5L) - Steel

Marco steel mainspring #3260 for Longines caliber 12.19 or 5L movements, and perhaps others, T-end, new in 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 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.