Receiving ‘jigger’ used by the Marconi Company, 1899
1899
1899
1895
1899
1898
1898
1899
1896
1897
1895
1896
1899
1894
2000-100 BCE
1898
1934
1899
1898
1898
1872 (original); 1909 (model)
1955; 1830
1895-1899
1896
1898-1899
1896
1896
1894
1897-1898
1894
1899
1896
1775-1799 (original); 1900-1907 (model)
1897
1990-96
1897
1899
1898
1894
1772 (original); 1919 (model)
1801-1840 (original); 1901 (model)
4000-2001 BCE
1705-1737
1898
1934
1897
1894
1899
1894
1898
1897
1897