Tru-Time Mainspring For Hamilton 12s Factory No. 1228 - Steel

Tru-Time Mainspring for Hamilton 12s Factory No. 1228, steel, new in envelope. See images for further details and 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.