Miracle Power Mainspring for Wittnauer caliber 11TN - Steel

Miracle Power No. 1570 steel mainspring for Wittnauer 11TN movements and perhaps others, steel, new in envelope. T-End Brace. 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 an adequate of representing the item.