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Telegraph block instrument, South Eastern Railway
circa 1905
circa 1905
1898
1892-1902
circa 1897
1901
2000-100 BCE
1904
1895
1901
1902
1904
circa 1900
1900
1899
1872 (original); 1909 (model)
1905
1955; 1830
1892
1897
circa 1900
1898-1900
1903
1901
1900
1895
1896
1892-1900
circa 1900
1898
1899
after 1903
1901
1906
1898
1901
1902
1898
1902
1896
1896
1906
1895-1905
1895-1899
1899
1899
1901
1901
1904
1903
1906