Johan Coenraad Altorf ( 1876 - 1955 ) was a Dutch painter. Johan Coenraad Altorf s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 5862.24 USD for A VULTURE in 2006 to 23128.24 USD for ALTORF in 2007 , based on the size and medium of the artwork.