HR Mainspring SA551 for 16s Rockford Factory No. 822 - Alloy

HR Mainspring SA551 for Rockford 16s Movements, Factory No. 822, T end, alloy, new in envelope. See image for precise characteristics. 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 and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.