Marco Marshalloy Mainspring 3260M for Longines Caliber 12.19, 5L - Alloy

Marco Marshalloy Mainspring 3260M for Longines caliber 12.19, 5L movements, and perhaps others as well, T-end, white alloy, 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.