Karl Koehler & Victor Ancona ( 1913 - ) is an American painter. Karl Koehler & Victor Ancona s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 5000 USD for THIS IS THE ENEMY! in 2006 to 7000 USD for THIS IS THE ENEMY. 1942 in 2009 , based on the size and medium of the artwork.