Willy Hamacher ( 1865 - 1909 ) was a Polish painter. Willy Hamacher s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 513.23 USD for Felsige Meeresküste in der Dämmerung in 2008 to 9094.74 USD for The Open Sea in 2012 , based on the size and medium of the artwork.