
Telegraph block instrument, South Eastern Railway
circa 1905
circa 1905
2000-100 BCE
1904
1902
1904
1872 (original); 1909 (model)
1905
1955; 1830
1903
after 1903
1902
1902
1904
1903
1903
1934
1903
1905
1839 (original); circa 1988 (replica)
1930 (replica); 1834 (original)
1905
1801-1892 (prepared); 1946 (element replaced)
1830 (original); 1967 (model)
4000-2001 BCE
1903
1990-96
1705-1737
1904
1902
1904
1903 (original); 1982 (model)
1772 (original); 1919 (model)
1903
1902
1905
1903
1934
1905
1940-03
1933-05
1939-02
1963-01
1969-03
1947-04
1940-01
1946-01
1947-05
1960-01
1940-01
1940-02