Nikolai Vasiliyevich Ovchinnikov ( 1918 - 2004 ) was a Russian painter. Nikolai Vasiliyevich Ovchinnikov s works have been put up for auction numerous times, with realized prices varying from 326.51 USD for Children in a gymnasium in 2005 to 598 USD for Birchtrees in 2007 , based on the size and medium of the artwork.