Theodor (wilhelm T ) Nocken ( 1830 - 1905 ) was a German painter. Theodor (wilhelm T ) Nocken s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 921.23 USD for Theodor NOCKEN in 2004 to 7230.84 USD for The Painter by a Mountain Lake in 2009 , based on the size and medium of the artwork.