1935
1940
1938
1936
1939
2000-100 BCE
1938 and 1951
1955; 1830
1937-1938
1938-1940
1937-1937
1990-96
1937
1935-1936
1938-1939
circa 1939
1986 (replica); 1501-1600 (original)
1801-1892 (prepared); 1946 (element replaced)