PM Merelloy Mainspring for 12s Waltham No. 2224A / 2279 - Alloy

PM Merelloy Mainspring for 12s Waltham, Factory No. 2224A / 2279, Hole end, alloy, new in frail 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.