Rudolf Holtappel ( 1923 - ) is a German painter. Rudolf Holtappel s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 198.33 USD for Jenseits von Eden in 2009 to 1111.71 USD for Kesselbau, Firma Babcock AG, Oberhausen. Kanalinspektion, Oberhausen in 2016 , based on the size and medium of the artwork.