Folke Sinclair ( 1877 - 1956 ) was a painter. Folke Sinclair s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 104.75 USD for Trädgrupp in 2005 to 275.16 USD for Vid kusten - Stubbenkammer Sassnitz in 2006 , based on the size and medium of the artwork.