Sigmund Barth ( 1723 - 1772 ) was a Swiss painter. Sigmund Barth s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 743.49 USD for Porträt einer Frau in 2006 to 4943.5 USD for Bildnis einer eleganten Dame mit einer Rose. in 2011 , based on the size and medium of the artwork.