
Telegraph block instrument, South Eastern Railway
circa 1905
circa 1905
1911
1913
2000-100 BCE
1904
1910
1910
1908
1904
circa 1910
1912
1909
1910
1872 (original); 1909 (model)
1905
1955; 1830
c.1912
1911
1906
1906
1912
1910
1910
1904
1906
1934
1907
1905
1839 (original); circa 1988 (replica)
1907
1913
1930 (replica); 1834 (original)
1905
1908
1801-1892 (prepared); 1946 (element replaced)
1913
c.1912
c.1912
1907
1830 (original); 1967 (model)
4000-2001 BCE
c.1912
1909
1909-1910
1990-96
1705-1737
1904
1911
1910
1904