Jan Vaclav Sladek ( 1906 - 1982 ) was a Czech painter. Jan Vaclav Sladek s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 240.51 USD for Gießerei. Arbeiter in großer Halle an geöffnetem Hochofenfeuer in 2004 to 2171.12 USD for Hukvaldy - Pocta Janáčkovi in 2014 , based on the size and medium of the artwork.