PM Mainspring for Majestic (Swiss) 12s Pocket Watch - ONYX Steel

PM ONYX steel mainspring for SWISS Majestic (G. Thommen) 12s pocket watch and quite likely others, new in lightly stained envelope. Majestic was a trade mark name used by Wittnauer and they were designed to fit into standard American cases. See images for precise mainspring specifications. I specialize in 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.