
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
1930
1610; 1923
circa 1923
circa 1925
1926
1927
1924
circa 1930
1922
1932
1924
1926
1931
1931
1931
1927
1925
1930
circa 1930
1928
1925
1928
1927
1922-1923
1922-1923
1922-1923
1922-1923
1925
1923
1924-1927
1931
1955; 1830
1925-1928
1927-1929
1928
1925-1927
1932
1924
1928
1926
1930