Cornelis (sees) Vlag ( 1934 - ) is a Dutch painter. Cornelis (sees) Vlag s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 65.82 USD for Flatgebouw in 2004 to 2715.96 USD for Industrieel ontwerp: Giganter in 2009 , based on the size and medium of the artwork.