
Meteorological Office aneroid barometer Mark I
1940
1940
1959
1940-1950
1926-1932
1962
1954
1952
1962
1958
1954
1960
1963
1964
1970
1959
1961
1969
1960
1956
1960
1969
1955
1962
1964
1952
1952
1963
1970
1960
1950
1954
1964
1968
1954
1960
1957
1963
1958
1961
1963
1968
1964
1957
1954
1965
1961
1957
1960
1969
1963