HR Nivastar Mainspring G563 for Tissot 23.3R-21, Lemanis 4550, 4500 - Alloy

HR Nivastar Mainspring G563 for Tissot 23.3R-21, Lemania 4550, 4500, Bulova 6AN caliber movements plus perhaps others, 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 a pretty good job of representing the item.