ΛΛ-10
ΛΛ-10 1790, 1791 ... 1938
Clearing Great Stair on North Slope ... ΛΛ-10 1808, 1809 ... 7 April 1939
ΛΛ-10 1814, 1815
ΛΛ-10 1940, 1941
ΛΛ-10 1942, 1943
ΛΛ-10 1944, 1945
ΛΛ-10 1946, 1947
ΛΛ-10 1948, 1949
ΛΛ-10 1950, 1951
ΛΛ-10 1952, 1953
ΛΛ-10 1954, 1955
ΛΛ-10 1956, 1957
ΛΛ-10 1958, 1959
ΛΛ-10 1960, 1961
ΛΛ-10 1962, 1963
ΛΛ-10 1964, 1965