Geheim- und Weltschreibmaschine »Discret«, 1899
("Secret and World Typewriter") by Friedrich Rehmann, Karlsruhe.
One of the most attractive typewriters ever built. 
Very important collector's item! Very rare!
Estimate: € 7,000/10,000
US$ 8,400/12,000
Reserve: € 6,000/US$ 7,200