Gustav Rudolf Undersaker ( 1887 - 1972 ) was a Norwegian painter. Gustav Rudolf Undersaker s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 615.28 USD for Kystlandskap in 2005 to 1940.74 USD for Bakke Bridge over the River Nid, Trondheim in 2010 , based on the size and medium of the artwork.