Marco Mainspring No. 2948 for Bulova caliber 4AK, 4AL, 5AR, 5AP, 5P, 5PP, 5PPI - Steel

Marco No. 2948 steel mainspring for Bulova caliber 4AK, 4AL, 5AR, 5AP, 5P, 5PP, 5PPI movements, and perhaps even more as well, 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 is 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.