Karl Oertel ( 1890 - 1979 ) was a German painter. Karl Oertel s works have been put up for auction numerous times, with realized prices varying from 203.56 USD for Der Abschied. Sich von seiner Frau und der Magd verabschiedender Reiter in blauer Jacke. in 2007 to 512.19 USD for Boy on a mountain. in 2014 , based on the size and medium of the artwork.