Gerard Altmann ( 1877 - 1940 ) was a Dutch painter. Gerard Altmann s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 830.29 USD for Koeien in een weide met links wilgen langs een vaart in 2004 to 6110.28 USD for THE ARBORETUM TROMPENBURG AT THE GROENE WETERING, KRALINGEN, ROTTERDAM IN BLOOM in 2010 , based on the size and medium o