late. 1868 - early 1900 Franz von Rohden (1817-1903), son of Martin Rohden, Rome; early 1900 - probably 1923 discount Bernt Grönvold (1859-1923); after 1923? - July 1935 Prof. Dr. Hans Mackowsky (1871-1938), Berlin; where acquired with funds from the legacy of Beer Carl Heine (1810-1865), April 1935
