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Meteorological Office aneroid barometer Mark I
1940
1940
1884
1914
1940
1950
1923
1876
1895-1905
1831-1870
1850
1870-1890
1848
1914
1986
1945-1954
1900-1920
1997
1997
1875
1871-1906
1912
1895-1905
1850
1871-1900
1915-1925
1963
circa 1900
circa 1880
circa 1910
1964
1885-1993
1875
1943-1983
1925-1983
1875
1850-1900
1984
circa 1910
1871-1900
1900-1924
1944
1913-1916