Karl Gerstner ( 1930 - 2017 ) was a Swiss painter. Karl Gerstner s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 881.44 USD for Color Sound B-11, Extra Version in 2005 to 13806.05 USD for COLOR SOUND 1C EXTRAVERSION in 2013 , based on the size and medium of the artwork.