Possibly Prince Elector Maximilian I, 1573 - 1651
Possibly Lumley Family
by 1948 -
Spink & Son, Ltd. (London, England), sold to Robert Bland Bird.
by 1952 - 1960
Sir Robert Bland Bird, second Bart., British, 1876 - 1960 (London, England, The White House, Solihull, Warwickshire, England), by inheritance to his only child, Pamela Stephanie Helen Bird, 1960.
Pamela Stephanie Helen Bird, viscountess de Mauduit (Paris, France)
Dr. Otto Wertheimer (Paris, France), sold to Max Schmidheiny, 1963.
1963 - 1991
Dr. h. c. Max Schmidheiny, 1908 - 1991 (Zürich, Switzerland), by inheritance to his son, Thomas Schmidheiny, 1991.
1991 - 2003
Dr. Thomas Schmidheiny (Zürich, Switzerland), sold through Hall & Knight, Ltd., (London, England) to the J. Paul Getty Museum, 2003.