Miracle Power Mainspring for Wittnauer caliber 10E - Steel

Miracle Power No. 1550 steel mainspring for Wittnauer 10E movements and perhaps others, new in envelope. The 1550 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.