HR Nivastar Mainspring G241 for Gruen caliber 290, 291, 295 - Alloy

HR Nivastar Mainspring G241 for Gruen caliber 290, 291, 295 plus perhaps similar ébauche watches, alloy, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ very 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 suitable good job of representing the item.