Franz Grässel ( 1861 - 1948 ) was a German painter. Franz Grässel s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1551.65 USD for Vier Enten im Schilf in 2004 to 18208.91 USD for ENTEN AM BACH in 2005 , based on the size and medium of the artwork.