Marco Mainspring #3046 for Tavannes 063, 064, 065, MST 346 - Steel

Marco steel mainspring No. 3046 for Tavannes caliber 063, 064, 065, MST caliber 346 movements and perhaps others, 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.