Peter Janssen ( 1906 - 1979 ) was a British painter. Peter Janssen s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 399.41 USD for Monochromatic, Magenta I in 2007 to 725.71 USD for STUDY OF TWO HEADS in 2013 , based on the size and medium of the artwork.