1936
1935
1934
2000-100 BCE
1938
1932
1955; 1830
1937-1938
1933
1938 and 1951
1937-1937
Before 1932
1990-96
1986 (replica); 1501-1600 (original)
1932-1933
1937
1801-1892 (prepared); 1946 (element replaced)