
Graphite Electrode
2022
2022
circa 1711
1960-2003
1878-1890
1977
circa 1930s
1980-1982
1980-1982
1956
1857
1857
1856-12-28
1997-2007
1997-2007
1956
1841-1900
1956
1935-1960
2020
1970
1980-1982
1701-1800
1841-1900
1795-1825
1997-2007
1936-7
1948
1980-1982
1970-1981
1992-1993
circa 1860
1997-2007
2020
2020
2020
unknown date
1750-1900
1863
1880-1886
unknown date
1796-1890
circa 1963
1999
1780-1820
circa 1950