Ordinary copper ore from Alderley Edge, Cheshire
before 1889
before 1889
1775-1800
1911
1920- 1960
1996
1930-1960
1960-1970
1920-1960
1943
1966
1935
1920-1960
1920-1950
1930-1960
1920-1960
1920-1960
1966
1934-10-23
1964-08-31
1920-1960
1993-1998
1920-1960
1994
1921-1930
1966
1966
1934-10-23
1934-10-23
1941
1966
1934-03-22
1968-1971
1957 (original); 1961 (model)
1968
1970
1920-1960
1920-1960
1960-1975
1900-1980
1920-1960
1920-1950
20th century