Willy Planck ( 1870 - 1956 ) was a German painter. Willy Planck s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 440.59 USD for Liegender nackter Knabe, mit strickender Schwester. in 2007 to 819.72 USD for ‘A Quiet Moment’; a young lady seated in a longboat on the shore of a lake in 2011 , based on the size and medium of the