
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1830 (original); 1967 (model)
1931
1927
1930
1927
1933
1931
1928
1924
1927
1928
1932
1955; 1830
1930-1931
1931
circa 1930
1928
1934
2000-100 BCE
Before 1932
before 1928
1932
1931
1927
circa 1930
1928
1930
1933
1933
1931
1932-1933
1928
1933
1934
Before 1932
1930 (replica); 1834 (original)
1801-1892 (prepared); 1946 (element replaced)
1928
4000-2001 BCE
1839 (original); circa 1988 (replica)
1930-1932
1930-1932
1930-1932
1930
1931
1903 (original); 1982 (model)
1930
1927
before 1930