Emil Preetorius ( 1883 - 1973 ) was a German painter. Emil Preetorius s works have been put up for auction numerous times, with realized prices varying from 339.88 USD for unknown in 2005 to 850 USD for EMIL U. WILLY PREETORIUS / BRAKL'S MODERNE KUNSTHANDLUNG in 2005 , based on the size and medium of the artwork.