Willem Key (after) ( 1515 - 1568 ) was a Dutch painter. Willem Key (after) s works have been put up for auction numerous times, with realized prices varying from 4905.33 USD for Portrait of a young man in 2007 to 5944.95 USD for PORTRAIT OF A GENTLEMAN WEARING A BLACK BERET AND A WHITE COLLAR in 2014 , based on the size and medium of the artwork.