circa 1950
1948
1951
1950-1952
2000-100 BCE
1950-1951
1950
1949
1955; 1830
1938 and 1951
1990-96
1986 (replica); 1501-1600 (original)
1903 (original); 1982 (model)
1830 (original); 1967 (model)
4000-2001 BCE
1952-08-29
1951-08-26