HR Nivaflex Mainspring G553 for Eterna caliber 702 - Alloy

HR Nivaflex Mainspring No G553 for Eterna caliber 702 and perhaps others as well, alloy, new in envelope. See images for further data and 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.