
Oxygen cylinder used by climbers on 1953 Mount Everest expedition
1952-3
1952-3
1830 (original); 1967 (model)
1928
1923
1923
1927
1926
1927
1668; 1924
1610; 1923
circa 1923
circa 1925
1926
1927
1924
1922
1924
1926
1927
1925
1928
1925
1928
1927
1922-1923
1922-1923
1922-1923
1922-1923
1925
1923
1924-1927
1955; 1830
1925-1928
1928
1925-1927
1924
1928
1926
2000-100 BCE
1923
before 1928
1934
1903 (original); 1982 (model)
1930 (replica); 1834 (original)
1926-1928
1927
1926
1839 (original); circa 1988 (replica)
1922-1925
1923