
Filter used to produce radioactive water
1901-1930
1901-1930
1986
1860-1910
1601-1800
1864
1880-1940
1941-1963
1943
1950-1960
1865-1875
1931
1914-1918
1601-1800
1761
1906
1970-1979
1940-1960
3000-2500 BCE
1753
1950-1955
1850-1920
1780
1780
1780
1780
1780
1780
1780
1872
1780
1780
1780
1932
1850-1900
1592-1600 (original)
1840-1860
1955
1914
1933
1891
1820-1900
1820-1900
1735-1772
1900-1919
1890-1940