Davosa Watch Argonautic Lumis BS 16152910. The high performance material BEYOND STEEL from DAVOSA has super-class material properties. It is almost as hard as diamond, is corrosion resistant and withstands the highest heat and is rust and nickel-free. BEYOND STEEL is practically indestructible. Due to its outstanding properties, DAVOSA has created the optimal material for the bezel inlay of the new DAVOSA Argonautic BGBS.