The "Junkers J1" Special version is devoted to an plane that took to the skies just once and but represented a revolution. Strictly restricted to 1915 parts. It incorporates a stainless steel case having a scratch-resistant sapphire crystal. It’s a hand-winding mechanical movement with 42 hours of power. Nomos Glashutte https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/