Erwin Kettemann ( 1897 - 1971 ) was a German painter. Erwin Kettemann s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 713 USD for Zugspitze mit Schneeferne in 2003 to 3105.87 USD for Early Spring in Berchtesgaden with the Watzmann in 2015 , based on the size and medium of the artwork.