Johann Georg Platzer (after) ( 1704 - 1761 ) was an Austrian painter. Johann Georg Platzer (after) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 3712.26 USD for Two elegant couples having a picnic in 2004 to 10054.92 USD for Pair of works: Family motifs with hunting trophies and musical instruments. in 2013 , based on the size