artman,
Try the Museum of Bogdan and Varvara Khanenko (Kiev) to apply for examination , there is a very good collection of Western prints, Rembrandt , I believe , too. A head . Department of Western European art , Elena Zhivkov specializes just on the Dutch school.
http://www.khanenkomuseum.kiev.ua/ua.../expertise.htm
Good luck !
PSA prints of the 1950s . , For example , are sold here ( prices are already quite different ):
http://www.resraritas.ru/index.php?m...re&id_lot=2193