Alfred Portmann ( 1899 - 1986 ) was a Swiss painter. Alfred Portmann s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1100.72 USD for Alp Flix,. 1964 in 2009 to 22331.4 USD for SILVAPLANERSEE, ENGADIN in 2014 , based on the size and medium of the artwork.