Marco Mainspring #3273 for Longines 5LN, 8M, 8.68ABC, 15.18 - Steel

Marco Mainspring 3273 for Longines 15.18, 5LN, 5LNS, 8M, 8MS, 8.68ABC and perhaps other similar movements, steel, 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 a pretty good job of representing the item.