Model ground signal, North London Railway
1888
1888
1934
1886
2000-100 BCE
1893-4
1872 (original); 1909 (model)
1955; 1830
1886-1887
1886
1888
1775-1799 (original); 1900-1907 (model)
1990-96
1934
1705-1737
1772 (original); 1919 (model)
1801-1840 (original); 1901 (model)
4000-2001 BCE
1930 (replica); 1834 (original)
1830 (original); 1967 (model)
circa 1886
1886
1887
1730; 1967
1972-3
2500 BCE
1886
1888
1915-1825
1990-95
1886
1886
1888
1901-950
1886
1800-1830
1801-1850
1800-1830
1859; 1986
1888-185
1888
1945-50
1887
1887
1888
1888
1888
1888
1886
circa 1888
1888