HR Mainspring A552 for 12s Rockford Factory No. 932 - Steel

HR Mainspring A552 for Rockford 12s Movements, Factory No. 932, steel, new in envelope. See images for precise mainspring specifications.  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 a pretty good job of representing the item.