HR Nivastar Mainspring G457 for Arogno 190, Felsa 400, Font 73, Favor 250 - Alloy

HR Nivastar Mainspring G457 for Arogno 190, Felsa 400, Font 73, Favor 250 caliber movements plus perhaps others as well, alloy, new in envelope. See images for precise mainspring specifications. 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.