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Clamp and part of stand for experimental apparatus
1890-1920
1890-1920
1930-1950
1880-1914
1940
1701-1800
1951
1933-1945
1920-1945
1930-1940
1801-1900
1750-1850
1890-1930
1880-1920
1880-1920
1801-1900
1901-1940
1850-1870
1890-1930
1890-1930
1900-1983
1912
1912
1912
1912
1912
1912
1912
1912
1912
1912
1912
1912
1912
1912
1895-1910
1895-1910
1895-1910
1895-1910
1900-1983
1843-1884
1912
1880-1920
1860-1930