
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1830 (original); 1967 (model)
1839 (original); circa 1988 (replica)
1929
1990-96
before 1930
1931
2000-100 BCE
1931
1990-95
1932
1932
1934
1930-1931
1928
1929
1933
circa 1932
1929
circa 1930
1934
1933
1933-09-11
1932
1930
1930s (1888)
1928
1928
1933
1929
1580-1588; 1930
1931
circa 1930
1903 (original); 1982 (model)
1929
4000-2001 BCE
1932
1928
1960-1979
1930s
2050-1750 BCE
1932
1955; 1830
1930-1932
1936
1928
1930s
1931
1834-1836
circa 1932