Miracle Power Mainspring for Wittnauer caliber 10T, 10TS - Steel

Miracle Power steel mainsprings for Wittnauer caliber 10T - 10TS movements and perhaps others, new in envelope. 1563 is a Tongue end version so make sure that's the one you need. 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.