
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1949
1830 (original); 1967 (model)
1949
1949
2000-100 BCE
1948
1955; 1830
1938 and 1951
1948
1948
1948
1948
1949
1948
1948
4000-2001 BCE
1839 (original); circa 1988 (replica)
1949
1949
1948
1903 (original); 1982 (model)
1949
1948
1990-95
1948
1962-05
1960-1979
1949
1948
circa 1948
circa 1948
1970-1900
30 CE
30 CE
2686-2613 BCE
1949
1859; 1986
1949
1948
circa 1948
2000-1350
1949
2000-1350
2000-1350
2000-1350
2000-1350
2000-1350
30-200
2000-1350