Hans Jürgen Kallmann ( 1908 - 1991 ) was a German painter. Hans Jürgen Kallmann s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 980.39 USD for Bildnis des Kunsthistorikers Dr. Ernst Buchner in 2005 to 1356.21 USD for Portr√§t Dr. Joseph Haubrich 1947 in 2007 , based on the size and medium of the artwork.