HR Nivaflex Mainspring G558 for Mido 501, 501A - Alloy

HR Nivaflex Mainspring No G558 for Mido 501, 501A caliber movements, 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 an adequate job of representing the item.